The basic controls are more or less the same as the older versions of the built in editor we could get the hacky DLL for if you ever used some of the early versions of that , othrwise just press escape and check the help menu there for the basics. Got a bunch of videos on the editor itself, outside of the map edits i do in paint.net im pretty much 100% in game now the way it should be, it's so much better these days.
The selection box is all - it's the Prefab masters lightsaber, probably the only thing to really practise with otherwise the rest of the editor now is just easy to use where it used to be an absolute ♥♥♥♥ around to have to learn a third party editor, it's features and especially having to rely on other people to carry work between versions... im sure im gonna run into a wall headfirst at some point but so far there have been no barriers, a few bugs and wonky bit here and there, but i pretty much build what I want how I want to now and it couldn't be better.
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Speaking of the editor,
How to shamelessly steal someones work to save time, use it as a starting point and end up with something totally differnt, enjoying the best of both.