How to delete these hidden geometry lines?

sketchup
geometry
modeling

#1

i need to pick all of thouse hiden geometry line and then delete them.
how can i do that?


#2

ThomThom’s CleanUp3 can erase coplanar edges.


#3

And if you only want to select them, you can use Thomthoms SelectionToys…
(Are those edges from the sandbox tools? Then they aren’t hidden but softened…)