There are a lot of ways to add glitches in Photoshop, but one of the most common is to use the glitch effect. This effect creates a temporary change in the appearance of an image, usually resulting in a more realistic or realistic-looking image. To use the glitch effect, you first need to create a new layer on your canvas. Then, select the glitch effect from the tools palette and click on it. Next, drag and drop an image onto the glitch layer. Finally, select the transparency slider at the bottom of the layer window and make sure it is set to 100%. When you have finished adding your glitch layer, press Ctrl+F5 to create a new file with the glitch effect applied.