Logitech K400 Plus - K400 Plus Extras; Touch Tap; Scrolling

 +Customize K400 Plus keyboard function keys
You can use Logitech Options software to customize the actions that are performed when you
use the function keys on your keyboard. You can download Logitech Options from the Wireless
Touch Keyboard K400 Plus Downloads page.
NOTE: Only the F1-F9 and Insert keys can be customized.