What is this grid? Can i hide it?

[designerasya]

[john_mcclenahan]

That is what SU shows for hidden faces. Go to the View menu and uncheck View/Hidden… to turn that off

[designerasya]

Thaks a lot.

[TheOnlyAaron]

Same way @john_mcclenahan said last time.

[designerasya]

Now it works)
Thanks for feedback.