Using CEC to power the TV on/off

I have no experience with CEC, trying to find tutorials and documentation. My internet search for "CEC LibreELEC" did not turn up much useful information, neither did Wiki search. I'm trying to figure out how to turn TV off when Kodi goes to sleep and turn it back on when I hit a remote button to wake it up. All links to relevant information are appreciated.

Thank you! The Input was the only place I had not looked at. How silly of me. Now it works exactly as I wanted. I was prepared to read documentation, write scripts, pull my [censored word], etc. None of this was needed. LOL