File | Settings | IDE Settings | Menus and Toolbars
The dialog box opens when you select an item in the Menus and Items List and click the Add After button.
In the dialog box, choose the desired action to be added to the menu or toolbar and optionally assign an icon to it.
|Action List||The list shows all the actions available in IntelliJ IDEA. The actions are grouped below nodes according to the areas of their use.|
In this text box, specify the location of the file with the icon you want to assign to the selected action. If necessary, use the
Browse button to select the file in the corresponding dialog.
|Set Icon||Click this button to associate the selected action with the icon specified in the Icon Path dialog box.|