you need to turn off Fn lock key by clicking Advanced > Function Key Behavior. On the All-in-One Media Keyboard, to enable FN Lock, simply press the FN key, and the Caps Lock key at the same time.

Select Treat top-row keys as function keys if you want to enable function keys. To toggle between shortcut and function behavior, press and hold the Search key. Select Enable auto-repeat to toggle ...

From here, you can change the function of certain keys. For example, select the Ctrl drop-down menu and choose one of the options listed. Select Enable auto-repeat to toggle the auto-repeat ...