# How can I pin edges in sculpt mode?

I want to maintain the edges of a surface pinned while I'm sculpting it to keep its positions. Is this possible?

Edges that I want to pin

After sculpt, the edges change its locations

Thanks for the comment! But the problem after hiding the edges, is that it generates a flat face. I want that part also constructed with a grid

• Does hiding them work? Select the edges you want "pinned" and press H to hide them, Blender generally keeps hidden geometry untouched – Duarte Farrajota Ramos Jul 15 '16 at 22:25
• Alternative : using the mask brush. But in both cases you'll have what you called a 'flat face' in your edit. You'll need to smooth it manually or add additional edges loops – lemon Jul 16 '16 at 15:13