File | Settings | IDE Settings | Keymap - Enter Mouse Shortcut
The dialog box opens when you select an action and click the Add Mouse Shortcut button. Use this dialog box to bind the selected action with a new mouse shortcut, which may be a single or a double clicking one of the mouse buttons or the wheel button.
The resulting mouse shortcut is marked with the icon in the Shortcuts list.
|Click Count||In this area, specify the type of mouse click to be assigned to the selected action. The available options are:
|Click Pad||Click the desired mouse button anywhere in this area.
The number of clicks in this area does not affect the shortcut configuration. No matter how many times you click a button, the click type chosen in the Click Count area will be assigned.
|Shortcut Preview||This read-only field shows the newly defined shortcut.|
This read-only field shows messages about conflicts that arise if a suggested mouse shortcut is already in use.
You can ignore a conflict and assign a shortcut to several actions. However it is strongly recommended that you avoid binding two actions with the same shortcut, because the priority of these actions is not defined.