While observing through the eyepiece while focusing, move the mechanical stage, and thus the slide containing the specimen using the X knob, which moves the stage right and left, and the Y knob, which moves the stage back and forth.
Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it forward and back.
