To make it easy for you to increase or decrease the volume, the iPad includes Volume Up and Volume Down buttons on its right side (shown earlier in Figure 3-1).
You can adjust the volume by pressing one of the volume buttons or by holding it down. When you adjust the volume, the iPad displays a ringer icon with a horizontal bar underneath that visually displays the current volume level, as shown in Figure 3-3. When you press and hold the Volume Down button, your iPad will be immediately muted.
Many apps, such as the iPod or YouTube app, also let you adjust the volume with a volume slider that appears on the screen. By moving this volume slider left or right, you can lower or raise the volume without touching the physical Volume Up/Down buttons on the side of the iPad.