Which Were Those 2 Commands That Allowed To Disalbe/Enable ALL the HUD notes with O ad P?

I saw a nice filming tips thread, but i can’t find it anymore…
I think it has been cancelled.
In that thread i found those usefull commands that allowed to enable/disable all the HUD/REATH NOTES AND OTHER THINGS BY PRESSING O/P, but now i don’t know how to find them.
Please i need them.
Thank you.