How to delete these hidden geometry lines?

[alizadeh.kourosh]

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

[DaveR]

ThomThom’s CleanUp3 can erase coplanar edges.

[Cotty]

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…)