The Toolbar panel is located at the top of the Blueprint Editor and contains some essential buttons for editing Blueprints:

The buttons are described as follows:

• Compile: Converts the Blueprint script into a lower-level format that can be executed. That means a Blueprint must be compiled before running the game or the changes made may not be reflected. Click this button to compile the current Blueprint. A green check icon will appear if there is no error.
• Save: Saves all changes made to the current Blueprint.
• Browse: Shows the current Blueprint Class in the Content Browser.
• Find: Searches nodes within a Blueprint.
• Class Settings: Allows editing of Class Settings in the Details panel. Class Settings contains some properties such as Description, Category, and Parent Class.
• Class Defaults: Allows editing of Class Defaults in the Details panel. Class Defaults are the initial values of the Blueprint variables.
• Simulation: Allows the execution to the Blueprint inside the Blueprint Editor.
• Play: Allows you to play the current Level.