The document provides basic rules for using a microscope: always carry it with two hands, start on the lowest power lens and leave it there when finished, use the coarse adjustment first to focus and then fine tune with the fine adjustment, especially for high power lenses, and always replace the dust cover when not in use.

1. The Microscope
Image courtesy of: Microscopehelp.com
Basic rules to using the microscope
1. You should always carry a microscope with two hands,
one on the arm and the other under the base.
2. You should always start on the lowest power objective
lens and should always leave the microscope on the low
power lens when you finish using it.
3. You should use the Course adjustment only to focus the
microscope at first, and then use the fine to get the image in
perfect focus. Always use only the fine adjustment when
using the high powered lens.
4. Always put the dust cover back on the microscope when
you are not using it.