Lock / Protection of cells

I know how to protect cells whereby other users are not able to change the cell, but someone sent me a worksheet where the only cells I can click on are the one I can edit. But I don't know how to do this. Does anyone know how to lock cells where you can't even click on it. Thanks.

when protecting the sheet you have options. I would recommend only having the checkbox for select unlocked cells.

Thanks. I got it to work.