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.
In this area, specify the type of mouse click to be assigned to the selected action. The available options are:
Click the desired mouse button anywhere in this area.
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.