Moon Suit Animator Help

I have recently tried getting into animating with Moon Animator, and I have looked on Youtube videos, and on here trying to find an answer to my question, but cannot seem to find it.

How do I extend a frame over a period of time? Like to have a door stay open for longer.

I am mainly trying to find, what is the keybind to extend it the time it holds, or how would I go about doing it?

I don’t animate much but I’m pretty sure you can just copy and paste the key points to when you want it to stop.

Edit: You just select all the keys for the door open then click shift+c then use shift+v where you want it to end in the time line

Alright, thanks! I will go ahead and try that soon!