You can customize your keyboard or mouse using Logitech Options software. If you don't already have Logitech Options installed, you can download it Here.

1. Launch the Logitech Options software:
   Start > Programs > Logitech > Logitech Options
2. In the main Logitech Options window, click the device you want to customize.
3. Click the framed key or circled mouse button you want to customize.
   NOTE: If a key or button is not framed or circled, it isn't programmable.
4. Choose the function you want to assign to the selected key or button from the drop-down list. The new function assignment is highlighted in green.