Problem of selection after a subdivision surface I can't understand why, after the apply of my sub surface, when i try to select all the mesh with a, the result come out is very weird (never seen before). From this 



Clicking a



This is the file. Try to apply the modifier and select all the mesh with a. What could be the problem? 



I can't figure out. Thank you
There is no problem with selection, but with so many edges, the edge info : Length looks messy.

You just need to deactivate it.