16. Controlling Image Output
What You’ll Do
Introduction
Once you create your Adobe Photoshop masterpiece, you will have to decide the output for the image file. This is not an easy decision. For example, an image created with a resolution of 72 ppi might be fine if output to the Web, but would not be of sufficient quality for output to a high-quality laser printer. In addition, images saved in the RGB color space would not work if the image were to be printed on a 4-color press, which uses the CMYK color space.
Raster images (such as Photoshop files) do not handle change very well, so it’s important to design with a goal in mind. Designers call this process a workflow. When you start a Photoshop project you should have a good idea of where the project is headed—to a press or inkjet printer, a copy machine, or a monitor. Knowing this information helps you design with the end in mind. That’s not to say you can’t make changes to a Photoshop document; however, when it comes to color space and resolution, the less change, the better the output quality.
When preparing images for the Web, it’s important to understand that file size and format are important considerations. People aren’t very patient when it comes to downloading web pages. Creating good-looking, yet fast-loading images keeps visitors on your web site, looking for more. Photoshop gives you the ability to perform image compression using formats such as the JPEG (Joint Photographic Experts Group), and GIF (Graphics Interchange Format) formats. Those formats will make your images as small as possible, while still retaining great quality. In image preparation it’s all about control, and Photoshop gives you the tools to make the job easy.
Working with Page Setup in Macintosh
Photoshop images can be printed out to virtually any device. For example, an image could find its way to a laser or inkjet printer, or a 4-color press. Even run-of-the-mill copy machines have options to print using information from Photoshop or similar applications used to design the image. What you need is Photoshop, an open image, and a good idea of where you want the image displayed. This may seem easy; however, a few careful adjustments will make all the difference in the world.
Work with Page Setup in Macintosh
Open a document.
Click the File menu, and then click Page Setup.
Click the Settings list arrow, and then click Page Attributes.
Select from the various Page Attributes options:
Format For.Click the list arrow, and then select a printer from the available options. If your printer is not accessible from the list, click the Edit Printer List, and then add your printer (you may need the printer disc, or access to the Internet, to load the latest drivers).
Paper Size.Click the list arrow, and select from the available options. The default printer will determine the available paper sizes.
Orientation.Click the Portrait or Landscape button; options vary depending on the printer.
Scale.Enter a percentage value to increase (over 100%) or decrease (under 100%) the size of the printed document.
Click OK.
Working with Page Setup in Windows
You can use the Page Setup dialog box in Windows to select the size and location in the printer of the paper you want to use. You can also select the page orientation (portrait or landscape) that best fits the entire document or any selection. Portrait orients the page vertically (taller than it is wide) and landscape orients the page horizontally (wider than it is tall). When you shift between the two, the margin settings automatically change. Margins are the blank space between the edge of the page and the printable area. The printer does not print within these margins. Different printer models support different options and features; available options depend on your printer and print drivers.
Work with Page Setup in Windows
Open a document.
Click the File menu, and then click Page Setup.
Select from the various Page Setup options:
Size.Click the list arrow, and then select from the available options. The default printer will determine the available paper sizes.
Source.Click the list arrow, and then select from the available options.
Orientation.Click the Portrait or Landscape option.
Margins.Enter Top, Bottom, Left, and Right paper margins for a customized document.
Click Printer if you have more than one printer, and then choose which one you will be using for the job.
Click OK.
Setting Document Print Options
PS 11.1, 11.2, 11.3
When you select the Print command, Photoshop displays a preview dialog box, which gives you the opportunity to view the image (on screen), and decide whether to print or return to the drawing board. The white area in the image preview is the printable area, while the shaded border at the edge shows the paper margins. You can adjust the position and scale of the image and see the results. The size of the image is determined by the document size settings in the Image Size dialog box. When you scale an image in the Print dialog box, the changes only affect the printed image, not the actual image. If you want to use the same print settings the next time you print, Photoshop can remember your settings.
Set Document Print Options
Open a document.
Click the File menu, and then click Print.
Choose from three output options:
Match Print Colors.Select to show the soft-proofed printed colors in the Preview.
If Match Print Colors is turned on, you will be able to add one or both of the following options:
Gamut Warning.(New!) Will highlight out of gamut colors.
Show Paper White.(New!) Sets image whites to the color of the paper being used to compensate for off-white or beige paper stock.
To change the image orientation, click the Portrait or Landscape button next to Page Setup.
Select from the various Position options:
Center Image.Select to instruct the output device to center the image on the paper.
Top.Instructs the output device to print the image from the top of the page.
Left.Instructs the output device to print the image from the left of the page.
Select from the various Scaled Print Size options:
Scale to Fit Media.Select to scale the document to the selected paper size.
Scale.Enter a percentage value.
Height.Enter an image height.
Width.Enter an image width.
Select the check boxes for the various options:
Print Selected Area.Select to print only the selected area of the image.
Bounding Box.Select to add a bounding box around the image.
Units.Specifies the units of measure for size settings.
Click Page Setup to choose setup options.
Click Print to open the Print dialog box.
To print one copy without displaying the Print dialog box, hold down Alt (Win) or Option (Mac), and then click Print One.
Click Done to return to your document without printing.
Did You Know?
You can manually scale and position an image.Select the Show Bounding Box check box, and then clear the Scale To Fit Media and Center Image check boxes. Then simply drag the image in the View window to reposition, and then click and drag a corner to resize.
Setting Print Output Options
PS 11.1, 11.3
On the right side of the preview Print dialog box, Photoshop not only gives you access to its powerful color management tools, it also lets you create calibration bars, add file name labels, and even place a custom border around the image. Click the Color Management list arrow, and then click Output. Photoshop displays a listing of all the options available, including the ability to print vector data or change the document’s encoding. For example, if you want to print a vector image that includes shapes and type with optimal results, you can use the Include Vector Data option to send the image to a PostScript printer. It’s just one more way that Photoshop gives you control over document output.
Set Print Output Options
Open a document.
Click the File menu, and then click Print.
Click the list arrow at the top right of the Print dialog box, and then click Output.
Select from the various Printing Marks options:
Calibration Bars.Prints a gradient tint bar to compare color ranges.
Registration Marks.Prints marks to align color separations.
Corner Crop Marks.Prints marks where the page is to be trimmed.
Center Crop Marks.Prints marks to identify the center of the page.
Description.Prints text provided in the File Info dialog box.
Labels.Prints the file name at the top of the page.
Emulsion Down.Prints images to film. Use to make type readable when printing to photographic paper facing away from you.
Negative.Prints an inverted image. Use if you want to print separations directly to film.
Select from the various Functions options:
Interpolation.Resamples the image to reduce the jagged appearance of a low-resolution image.
Include Vector Data.Select to print a vector image. If the option is grayed, the image doesn’t contain vector data.
Send 16-bit Data.Select to have 16-bit per color channel data sent to the printer (Mac only).
Background.Selects a background color to be printed outside the image area.
Border.Prints a black border around the image.
Bleed.Prints crop marks inside rather than outside the image.
Screen.Sets the print screen frequency and dot shape.
Transfer.Adjusts the dot gain or loss, which can be used to compensate for a poorly calibrated output device.
Click Print to open the Print dialog box.
Click Done to return to your document without printing.
See Also
See “Setting Document Print Options” on page 372 for information on using the preview Print dialog box.
Printing a Document in Macintosh
PS 11.1, 11.3
The Print command is probably the most used of all Photoshop’s print options. In addition to normal printing functions, such as Copies and Pages, the Print command gives you other menus that let you control specific printing functions, such as output ink and color management. Understand that the options available for the Print command will be partially determined by your default printer. For example, if your default printer uses more than one paper tray, you will see options for selecting a specific tray for the current print job. In spite of the differences, there are some universal options for all print jobs, and these are covered here.
Print a Document in Macintosh
Open a document.
Click the File menu, and then click Print.
A print preview dialog box opens.
Specify the print options you want, and then click Print.
Click the Expand/Collapse button to expand the dialog box, if necessary.
Click the Printer list arrow, and then select from the available printer descriptions.
Click the Presets list arrow, and then select from the available preset options.
Select from the various options: Number of copies, Collated, Print All or Range of pages. Options vary between Windows and Macintosh.
Click the Print Options list arrow, click Layout, and then select the various options: Pages Per Sheet, Layout Direction, and if you want a Border.
To print the document at a later time, click the Print Options list arrow, click Scheduler, and then select the options you want.
To set paper-related options, click the Print Options list arrow, click Paper Handling, or Cover Page, and then select the options you want.
To set color-related options, click the Print Options list arrow, click Color Management, and then select the color options you want.
Click the Print Options list arrow, click Summary, and then view the summary of settings.
Click the following options to finalize your print: PDF, Preview, Supplies, Cancel, or Print.
PDF.From the menu, select the PDF option you want.
If you need additional help along the way, click the Help button.
Did You Know?
You can save print options as a preset (Mac).In the Print dialog box, select the options you want, click the Presets pop-up menu, click Save As, type a name, and then click OK.
Printing a Document in Windows
PS 11.1, 11.3
Printing a paper copy is the most common way to preview and share your documents. You can use the Print dialog box to set how many copies to print, specify a range of pages to print, and print your document. Understand that the options available for the Print command will be determined by your default printer and operating system. Different printers will display different options. There are some options that are fairly universal, however, and these options are covered here.
Print a Document in Windows
Open a document.
Click the File menu, and then click Print.
A print preview dialog box opens.
Specify the print options you want, and then click Print.
If necessary, click the Name list arrow, and then click the printer you want.
Type the number of copies you want to print.
Specify the pages to print:
All.Prints the entire document.
Selection.Prints the selected item.
Current Page.Prints only the active page.
Pages.Prints the specified pages.
Click Print.
Printing Part of a Document
PS 11.1
If you only want to print part of an image in a Photoshop document, you can use the Print Selected Area option in the Print dialog box to quickly perform the task. All you need to do is select which part of the image you want to print, select the Print command on the File menu, select the Print Selected Area check box, and then send it to the printer.
Print Part of a Document
Open a document.
Select the Rectangle Marquee tool on the toolbox.
Select a section of the image you want to print.
Click the File menu, and then click Print.
Select the Print Selected Area check box.
Click Print.
Did You Know?
You can scale an image if it’s larger than the printable area of the paper.If a warning appears indicating your image is larger than the printable area, click Cancel, click the File menu, click Print, select the Scale To Fit Media check box, and then click Print. You can also click the File menu, and then click Page Setup to change your paper size.
Printing One Copy
If you want it quick without any questions, then the Print One Copy command is for you. There’s no hassle; you just get a printed copy of the image, using Photoshop’s default print settings. The Print One Copy command does not open a dialog box, so when the option is selected, the printing process starts and an attempt is made to print the document. If you try to print an image that is larger than the paper’s printable area, an alert dialog box appears. If this happens, you have the option of continuing the printing process, or canceling. Otherwise, the Print One Copy command is a one-click way to get a fast printed copy of your active document.
Print One Copy of a Document
Open a document.
Click the File menu, and then click Print One Copy.
Photoshop prints a single copy of the image without a dialog box.
Important
If you have made any changes to Page Setup, or modified the printer settings in any way, Photoshop will ignore its default settings and print using your modified settings.
Timesaver
In the preview Print dialog box, hold down Alt (Win) or Option (Mac) to display Print One.
Understanding File Formats
PS 1.7
Saving a Document with a Different File Format
PS 9.6, 11.4
After all your hard work, you now need to save your document. The saving process involves selecting a specific file format, naming the file, and choosing a destination. Choose a file name that will help identify the document (looking in a folder of 100 images and seeing file names such as image_a, image_b, really doesn’t help). Select a destination, such as a hard drive, removable media, or even a rewritable CD or DVD. Determine the format of the document file. While name and location are important, the file format is crucial to the future of the image. The file format determines how the document is stored, and what information is saved with the file. Choosing the wrong format may even prevent you from correctly outputting the file.
Save a Document with a Different File Format
Open a document.
Click the File menu, and then click Save As.
Enter a name in the File Name (Win) or Save As (Mac) box.
Click the Format list arrow, and then select a format.
See the table on the previous page for assistance.
Click the Save In (Win) or Where (Mac) list arrow, and then select a location in which to save the document file.
See Also
See “Understanding File Formats” on page 381 for information on the different file formats.
Select from the following Save options:
As a Copy.Select the check box to save a copy of the file, while leaving the original open.
Alpha Channels.Select the check box to save any alpha channel information.
Layers.Select the check box to preserve all layers within the document.
Notes.Select the check box to save any note annotations with the document.
Spot Colors.Select the check box to save any spot channel information.
Select from the following Color options:
Use Proof Setup.Select the check box to create a color-managed document.
Embed Color Profile (Mac).Select the check box to create a color-managed Macintosh document.
ICC Profile (Win).Select the check box to create a color-managed Windows document.
Click Save.
Inserting File Information into a Document
PS 1.5
When you save a document, you have the ability to save more than just color information. You can save copyright, camera, and even image category information. This data is saved with the file as metadata in the XMP format (Extensible Metadata Platform), and can be accessed by any application that reads XMP data. In addition, if the image is a photograph, you can save data specifying the type of image, where it was shot, or the camera used. You can even get information on shutter speed and f-stop. That information will not only protect your intellectual property, but will supply you with vital statistics on exactly how you created that one-of-a-kind image.
Insert File Information into a Document
Open a document.
Click the File menu, and then click File Info.
Click Description, and then enter information concerning the author and any copyright information.
Click Camera Data, which reveals information about the camera that took the image.
These are read-only fields and include information such as camera model, ISO, aperture, metering, shutter speed, and pixel dimensions.
Click History to view historical information about the active document, such as dates last opened and saved, and a list of adjustments performed on the image.
Click IPTC, and then IPTC Contact, IPTC Image, IPTC Content, and IPTC Status to enter information concerning the image’s creator, description and keywords, location where photograph was taken, date created, copyright, and usage terms.
Click Origin, and then enter data pertaining to the origin of the image.
Click Advanced to view additional information on the active document, such as EXIF, and PDF document properties.
Click OK.
Did You Know?
You can add metadata to files saved in the PSD, PDF, EPS, PNG, GIF, JPEG, and TIFF formats.The information is embedded in the file using XMP (Extensible Metadata Platform). This allows metadata to be exchanged between Adobe applications and across operating systems.
You can use the XMP Software Development Kit to customize the creation, processing, and interchange of metadata.You can also use the XMP kit to add fields to the File Info dialog box. For information on XMP and the XMP SDK, check the Adobe Solutions Network.
Understanding File Compression
PS 1.7
Compression is Photoshop’s way of reducing the size of a document file, kind of like the ultimate weight-loss program. Just click a button, and the file can be reduced to half its original size. Photoshop employs two types of compression schemes: lossy and lossless. Lossy compression reduces the size of the file by removing color information—information that can never be restored to the saved document. Lossy compression schemes can achieve file reductions of 80% or greater.
The Lossless method reduces file size by using compression algorithms that reduce the size of a file without removing image information. Lossy methods are used primarily for images displayed in browsers (images for the Web). The relatively slow speed of the Internet forces web designers to employ lossy compression methods to reduce images down to their smallest values. Lossless methods are used when the reduction of a file is important, but not so much that you would consider removing information. For example, you might want to reduce the size of a group of high-quality TIFF images so they fit on a rewritable CD. Lossless compression methods can reduce files sizes up to 50%, or even a bit more.
Both methods compress documents based on the actual image information. For example, images that contain a lot of solid color information would compress quite well using the GIF (Graphics Interchange Format) or PNG-8 formats, whereas an image with a lot of continuous tone colors, such as a photograph, would be best compressed using the JPEG (Joint Photographic Experts Group) format.
Lossy
Lossless
Preparing Clip Art for the Web
Clip art is defined as non-photographic image information, with a lot of solid-color areas. When saving this type of file, the GIF or PNG-8 formats would work best. The GIF (Graphics Interchange Format) and PNG (Portable Network Graphics) formats use an RLE (Run Length Encoding) scheme. When the file is saved, areas of solid color are compressed into small units and then restored to the file when it is opened. The GIF format supports a maximum of 256 colors. While that may not seem like much, most GIF images, such as clip art and text, contain far less color information. By reducing the number of colors available for the GIF color table, you can significantly reduce the image’s file size. For example, a GIF image composed of black text might only require a maximum of 2 colors (black and white). Experiment with the GIF Colors option to produce small, fast-loading image files. Since the GIF format has been around for a long time, using it almost guarantees that the image will open on a visitor’s browser. The PNG format is newer, and has some new encoding schemes that make even smaller files, but it is not supported by all web browsers.
Prepare Clip Art for the Web
Open a clip art document.
Click the File menu, and then click Save As.
Enter a name for the file in the Save As box.
Click the Save In (Win) or Where (Mac) list arrow, and then select a location in which to save the file.
Click the Format list arrow, and then click CompuServe GIF.
Click Save.
Select from the following Indexed Color options:
Palette.Click the list arrow, and then select from the available color palette options, including Web (Safe), Mac, and Win System panels.
Colors.If you selected a local color, or custom panel, click to select the number of colors saved with the image. The maximum number of colors is 256.
Forced.Click the list arrow, and then select what colors will be retained in the image.
Transparency.Select the check box to preserve any transparent areas.
Matte.If the image contains transparent areas, clicking this list arrow lets you select a color to fill the areas. For example, you could fill all transparent areas of the image with black to match the black background of a Web document.
Dither.Click the list arrow, and then select how you want the remaining image’s color to mix.
Amount.Enter an Amount percentage to instruct the GIF format how aggressively to dither the image colors.
Preserve Exact Colors.Select the check box to force the preservation of the original image colors (based on how many colors were chosen using the Palette option).
Click OK.
Preparing a Photograph for the Web
Reducing the size of a photograph presents its own particular set of problems, and Photoshop comes to the rescue with solutions. For photographic images, the best format to use is the JPEG (Joint Photographic Experts Group) format. This format reduces file size by removing image information (lossy compression). For example, a 1 MB uncompressed TIFF file can be reduced to 20 KB or 30 KB using JPEG compression. That reduces the download time of the image on a 33 KB modem from15 minutes to 10 seconds. While that is quite a reduction, it also means most of the image colors have been removed and the remaining colors are dithered (simulated) to fool the eyes into seeing colors that are no longer in the image. Highly compressed JPEG images look good on a monitor, but fare poorly when sent to a printer.
Prepare a Photograph for the Web
Open a photographic document.
Click the File menu, and then click Save As.
Enter a name for the file in the Save As box.
Click the Save In (Win) or Where (Mac) list arrow, and then select a location in which to save the file.
Click the Format list arrow, and then click JPEG.
Click Save.
Select from the following JPEG Options:
Matte.The JPEG format does not support transparency. Click the Matte list arrow, and then select the color with which to fill transparent areas within the active document.
Quality.The Quality option determines the amount of image information loss. Enter a value from 1 to 12; the higher the value, the more information is retained, thus creating a larger file.
Baseline (Standard).The format is recognized by most browsers.
Baseline Optimized.Produces optimized color, and a slightly smaller file size, but is not supported by older browsers.
Progressive.Displays a series of increasingly detailed scans as the image downloads. The visual impression is of a blurred image slowly coming into focus (not supported by older browsers).
Scans.If Progressive is selected, select the number of scan passes for the image.
Click OK.
Preparing an Image for the Press
Images saved for press printing are in another world. For example, images displayed on a monitor use the RGB (additive) color space, while images sent to a press use the CMYK (subtractive) color space. The format of choice is the DCS (Desktop Color Separations) format. The DCS format is a version of the standard EPS format that lets you save color separations of CMYK images. DCS comes in two flavors, DCS 1.0 and DCS 2.0. Both create five separate files: one is for each of the four color plates, Cyan, Magenta, Yellow, and Black, and one is for a combined, or composite image. However, the DCS 2.0 format allows you to save alpha and spot-color channels, as well as giving you the option of saving the five separate files under one combined file name. You can also use the DCS 2.0 format to export images containing spot channels. It’s important to understand that the only device that can print a DCS file is a PostScript printer. As with anything related to press operations, always contact your friendly press operator and ask what format to use.
Prepare an Image for the Press
Open a document.
Click the File menu, and then click Save As.
Enter a name for the file in the Save As box.
Click the Save In (Win) or Where (Mac) list arrow, and then select a location in which to save the file.
Click the Format list arrow, and then click Photoshop DCS 2.0.
Click Save.
Select from the following DCS 2.0 Format options:
Preview.Click the list arrow, and then select what type of low-resolution image to use in the layout application.
DCS.Click the list arrow, and then select how you want the color plate information saved.
Encoding.Click the list arrow, and then select how the image data is encoded for delivery to the output device (contact your service bureau).
Include Halftone Screen.Select the check box to include any halftone screens.
Include Transfer Function.Used with high-end commercial production jobs.
Include Vector Data.Select the check box to include any vector data contained within the active image.
Image Interpolation.Select the check box to create an anti-aliased version of the Preview image (does not impact printing).
Click OK.
Preparing an Image for an Inkjet or Laser Printer
PS 11.3
While not everyone has access to a 4-color press, even casual computer users have or have access to, an inkjet or laser printer. Inkjet and laser printers apply color to the paper using dots of ink. In fact, one of the measurements of quality for this type of output is its printing resolution. For example, a photo-quality inkjet or laser printer can have a resolution of 1,400 dpi and higher, or one thousand four hundred dots of color information per linear inch. There are several file format options to print this type of output; however, none is as versatile as the TIFF format. The Tagged-Image File Format uses lossy or lossless compression, and lets you save multiple Photoshop layers, as well as alpha channel information. In addition, there is hardly a layout application in the marketplace, Macintosh or Windows, that will not open an image saved in the TIFF format.
Prepare an Image for an Inkjet or Laser Printer
Open a document.
Click the File menu, and then click Save As.
Enter a name for the file in the Save As box.
Click the Save In (Win) or Where (Mac) list arrow, and then select a location in which to save the file.
Click the Format list arrow, and then click TIFF.
Click Save.
Select from the following TIFF Options:
None.No compression is performed to the image.
LZW.Performs lossless compression to the image. When this method is used, the receiving application must have the corresponding LZW option or it will not be able to decompress the file.
Zip.Performs a standard Zip (lossless) compression to the image. Receiving application must have an unzip utility.
JPEG.Performs lossy (image loss) compression to the image.
IBM PC.Select PC if the image is to be used on an IBM system. Works also on Macintosh systems.
Macintosh.Select Macintosh if the image is to be used on a Macintosh system.
Save Image Pyramid.Check to save the image using several image resolutions. Lets you decide what resolution to use when reopening the image.
Save Transparency.Check to preserve any transparent areas in the active image.
RLE.Run Length Encoding (RLE) helps to compress solid areas of color across multiple layers.
ZIP.Uses the Zip format to compress multiple layers.
Discard Layers and Save a Copy.Creates a copy of the file without the layers, essentially saving a composite image file.
Click OK.
Understanding Monitor, Image, and Device Resolution
PS 1.4
Remember that raster images are all about resolution. Images have a specific scanned resolution (spi, samples per inch). Your monitor also has a native resolution (ppi, pixels per inch), as does output devices such as inkjet printers (dpi, dots per inch), and high-end presses (lpi, lines per inch). While all these terms may seem a bit complicated, they’re not; they simply explain how much information is contained within the image.
Most computer monitors are set to a fixed resolution of 72 or 96 ppi. Say you scan a 4 by 4 inch image at 288 spi (that’s 4 times the resolution of a 72-ppi monitor). If you attempted to display the image at 100% view, the monitor would take the image pixels and adjust the width and height to match its resolution, so the image would be 16 by 16 inches (288 divided by 72 = 4). If the display of the image doesn’t fit the size of your monitor and you attempt to reduce the magnification of the image to make it fit the monitor size, Photoshop will have to remove pixels from the image to make it fit. This typically causes the image to generate jagged lines, especially around angles. The moral of this story is: when adjusting an image for viewing on a monitor (for example, when preparing a slide presentation), never change the zoom of the image to fit the monitor; always adjust the resolution by selecting the Image menu, and then clicking Image Size.
When it comes to output, such as to an inkjet printer, the rules are a bit more forgiving. Many output devices have print resolutions of 1,440 or higher. However, we’re not talking about fixed monitor pixels (ppi), we’re talking about dots of ink hitting a piece of paper (dpi). Most inkjet printers, because of the dot gain of the inks (that’s the amount of space over which a dot of ink spreads when it hits the paper), do not need image resolution greater than 300 spi. Although image quality suffers when you enlarge an image beyond its original size for viewing on a monitor, if you use higher resolutions than needed when you print, the image won’t be degraded; you’ll just be printing an image with a larger file size. However, that can be a waste of time. For example, a 300 spi, 8 by 10 inch image will have a file size of about 20 MB; the same image scanned at 1,200 spi will produce a 329 MB file size. When you print the two images, you will probably not notice any difference in quality; however, it will take, on average, 6 minutes longer to print the 1,200 spi document on most mid-range printers.
The bottom line is that resolution represents the amount of information contained within a linear inch; however, various devices handle that same resolution differently. The good news is that understanding those differences helps you to create a useable workflow. Knowledge is power.