1. Microscope installation firstly hold the mirror arm with your right hand and the mirror holder with your left hand. 2. Place the microscope on the experiment table, slightly to the left (the microscope is placed about 7 cm from the edge of the experiment table). Install the eyepiece and objective lens. 3. Rotate the converter to align the low-power objective lens with the light hole (the front end of the objective lens and the stage should be kept at a distance of 2 cm).