Thanks @indahnuria 
This is a re-write of my original post for the old Connect from June 2020:
How To Accelerate Message Composing in LG Connect
It is well-known that most advanced online email composers and down to a simple text field have common keyboard shortcuts like Ctrl+C, Ctrl+V, Ctrl+X, Ctrl+Z, and so on…
What @ErmesT has mentioned is an open secret 