A cool hack I saw on Youtube is to stretch a piece of painter's tape or masking tape across the back of the shelf, covering the mounting holes. Mark the hole locations onto the tape, then remove the tape. Now apply the tape to the wall to accurately locate and level the mounting holes.
LiveThought9168 t1_j24e5xr wrote
Reply to Help hanging a shelf I found! I'm at a total loss because I'm a noob... by Megraptor
A cool hack I saw on Youtube is to stretch a piece of painter's tape or masking tape across the back of the shelf, covering the mounting holes. Mark the hole locations onto the tape, then remove the tape. Now apply the tape to the wall to accurately locate and level the mounting holes.