Launch SetPoint (Start > Programs > Logitech > Mouse and Keyboard > Mouse and Keyboard Settings).

NOTE: If you don't have SetPoint installed, you can download it from the K800 Downloads Page.

Click the My Keyboard tab at the top of the SetPoint Settings window.

NOTE: If you have more than one Logitech keyboard and the K800 isn't currently displayed, click the down-arrow icon next to the current product name and select Wireless Illuminated Keyboard K800 from the drop-down menu that displays

Choose the key you want to customize in the Select Hot Key field

Choose the task you want to assign from the Select Task list.

NOTE: You can click the "?" icon next to Hot Key Settings at the top for detailed descriptions of these options.

Click Apply to save your settings and then OK to close SetPoint.