This must be a list that specifies the mouse button and modifiers.
The supported modifiers are `meta', `shift', and `control'.
For instance, `(meta shift 1)' means that holding the meta and shift
This must be a list that specifies the mouse button and modifiers.
The supported modifiers are `meta', `shift', and `control'.
For instance, `(meta shift 1)' means that holding the meta and shift