Update() Functionality in Editor?

Unity Engine
1

Is there a place where I can change the way my object renders in Editor (such as adjusting its material or mesh on the fly) via a MonoBehavior, or do I have to always hit the “run” button to see how things actually will appear?

2

To make a game run in the editor (while your not in play mode) you would add this line somewhere in your script (outside of a function).

@script ExecuteInEditMode ()
3

Sweet! Thanks!

Is there a spot in the docs where I can find awesome little things like this??