Want to help a friend with a desktop problem

[jd1008]

On 08/07/2015 01:45 PM, Paul Cartwright wrote:
> On 08/07/2015 03:24 PM, jd1008 wrote:
>>
>> So, something changed, that has disabled the cntrl-alt-f keys.
>>
>> Any clues how to restore it?
> right click on menu icon->preference->keybord shortcut
>
For Mate DT, what icon are you referring to?

I have

System -> Preferences -> Hardware -> Keyboard

There nothing there about shortcuts.