Appearance and Behavior

File | Settings | Appearance and Behavior for Windows and Linux
IntelliJ IDEA | Preferences | Appearance and Behavior for OS X Ctrl+Alt+S

When you select the Appearance and Behavior category in the left-hand pane, its main subcategories are listed in the right-hand part of the dialog.

• Appearance
• Menus and Toolbars
• System Settings
• File Colors
• Scopes
• Notifications
• Quick Lists
• Path Variables