Logitech PRO WIRELESS Guide D'installation page 6

BUTTON CONFIGURATIONS
PRO WIRELESS comes with replaceable buttons and button caps,
which are held onto the mouse magnetically These should be
stored in box when not in use These replaceable buttons support
conversion to the following configurations:
1 Right handed
2
Left handed
3
No buttons
4 Full buttons
1
R
2
L
6 ENGLISH