This client had a Pinterest photo of floating bookshelves in a kids room. She wanted me to mount them so it would look similar. She was not home when I installed them so I text this photo to her. She said "OMG, I love it!"

To intall shelves or art, I usually find the center of the wall, then the center of the shelf or picture, then measure out to the holes and mark them on the wall. Then repeat for additional shelves. Pretty easy, pretty quick when you do as many as I do.