Hi
For some reason, Layout will NOT let me add Points to a Curve or Shape, once I have double clicked it.
All the points are highlighted, and the guide at the bottom states to hold Alt to add Points.
It does not work for some reason. 
Mike
It lets me do it in a new file, but not the one I’ve just created.
Layout File attached.
All I’ve done in this one is add the Model and create a couple of overlay shapes.
Mike
Just tried restarting Layout as well.
No joy.
Is it because object snapping is off…?
Want t share my screen. its rediculous.
I hate Layout!
Unbelievable! That’s what it was. Why should that make any difference?
I so wish Trimble would actually put some effort into improving Layout.
Mike
Sorry. I got called away but it looks like Paul got you sorted.
Without Object Snapping turned on you can’t actually snap anything to an object.
No worries @DaveR
Yeah, that was the issue, so all good now.
Layout just Frustrates the hell out of me 
Mike
Well, glad it’s sorted.
I wish I knew how to make it so you weren’t frustrated with it. I like using LayOut and it gets better with every version.
I do like it and what it can produce. I just think it is like pulling teeth sometimes and could be easer to use, to align with how Sketchup works.
I love modelling in Sketchup, but always feel less about Layout.
Mike