A crooked picture frame can make your whole room feel off-kilter, but with some quick and easy tricks you can make it level in no time. Here you will learn how to level a picture frame both by "eyeballing" it and by using a small construction level you can find in a hardware store. Then you can go around confidently adjusting all those pictures that just don't look quite right.
The best way of knowing if your pictures are crooked is obviously by looking at them. In old homes, uneven flooring, wall tile jobs that have shifted as the house has settled and walls that have warped slightly with time can make a picture that is technically level with the ground feel off. It is less important that your picture is level according to a tool than that it feels right when you look at it. If the crooked picture is hanging from a wire stretched across its back, move it slightly to the left or the right to adjust its angle. Take a step back to see if you have corrected the problem. Continue to move the picture back and forth until it looks right.
Use a small construction level to check a picture's evenness with the ground if you are not confident that you can judge it with your eyes. Place the level on top of the picture frame. If the picture is level, the air bubble in the level will move to the center of the level. Adjust the picture until it is level.
If a picture continuously slips and becomes crooked, install an additional nail on which its wire can rest. Distributing the weight of the picture more evenly can make it more difficult for the frame to shift around. Additionally, install a wire behind pictures that hang from a single nail. This will make it easier to adjust them when they become out of whack.