How to Use Ctrl-Alt-Delete and Common Key Combinations
Remote Control from a Phone or Tablet
When connected to a Windows PC, use the Key Combinations icon to access the Ctrl-Alt-Del key combination.
On the main remote control screen (not the onscreen keyboard), tap
the
Key Combinations icon.

The Ctrl-Alt-Del command is sent to the host computer.

The Ctrl-Alt-Del command is sent to the host computer.