I would like to be able to take screenshots of the current videoframe available on the osmc UI, only being able to do so with a keyboard attached is a bit of a bummer.
In addition it would have to save it to a predetermined default location.
Screenshots are saved to a predetermined location.
You can initiate it via kodi-send command.
Not sure how you want to trigger it from UI without keyboard?
Can’t you use keymap editor and map screenshot to a button on your remote?
Install from repo
All Repositories
Program Addons
Key map editor -> install
Edit
Select Action Category -> Programs -> Other
Take a screenshot
Edit -> press the key within 5 seconds (which you wish to use to take screenshots but make sure it has no function under kodi/elec).
Do not forget to select SAVE on exit.