Instructions on Anchoring a 2-by-4 to Drywall
Use the stud finder to locate the stud closest to where the 2-by-4 will be attached to the drywall.
Mark the location of the stud with the pencil. Marks should be made on the drywall approximately where each end of the 2-by-4 will be once anchored.
Line the 2-by-4 up with the marks on the wall. Use the drill to put in a single screw in one end of the 2-by-4.
Use the level to ensure the 2-by-4 is straight before putting a second screw in lumber approximately two feet down from the first screw.
Drive in one screw every two feet until the end of the board is reached. Use the level to ensure the 2-by-4 has not moved.