Mouse buttons define how a Windows system pointing device functions. You can customize the behavior of a mouse or other pointing device in the Customize User Interface (CUI) Editor. If a pointing device has more than two buttons, you can change the behavior of the second and third buttons. The first button on any pointing device cannot be changed in the Customize User Interface (CUI) Editor.

By using the Shift and Ctrl keys, you can create a number of combinations to suit your needs. Your pointing device can recognize as many commands as it has assignable buttons. The Mouse Buttons section of the tree node is organized by keyboard combination such as Click, Shift+Click, Ctrl+Click, and Ctrl+Shift+Click. The tablet buttons are numbered sequentially. Drag a command to assign the command to a mouse button. Create additional buttons by dragging commands to a Click node.

The following table shows the Click mouse button properties as they appear in the Properties pane.