What is accomplished turning the carse adjustment upwards in microscope?

Turning the coarse adjustment knob upwards on a microscope raises the stage and brings the specimen closer to the objective lens. This movement helps focus the image of the specimen, allowing for clearer observation. However, it is essential to use this adjustment carefully to avoid crashing the lens into the slide, which can damage both the slide and the objective lens. Fine adjustments can then be made for more precise focusing.