1. A computer implemented method for presenting an image to a user of a specimen on a microscope slide on an electronic display screen, said method comprising: using a microscope to capture a plurality of images of the microscope slide, each of the captured images corresponding to a magnification; providing, on the electronic display screen, at least one previously-captured image from the plurality of images of said microscope slide to the user; presenting a plurality of selectable objectives on the electronic display screen for viewing said microscope slide, the plurality of selectable objectives including at least a first objective identifying a first magnification of the plurality of previously captured image magnifications and at least a second objective identifying a second magnification different from the first magnification that is not a magnification matching the magnification of any of the plurality of previously captured images; accepting a selection from the user of one of the plurality of selectable objectives, said selected objective corresponding to the desired magnification; and if the selected objective is identified as having the same magnification of one of the plurality of previously-captured images, displaying the one of the plurality of previously-captured images having the same magnification as the selected objective on the electronic display screen, and if the selected objective is not identified as having the same magnification as one of the plurality of previously-captured images, using the microscope to obtain a real-time image of the microscope slide at the desired magnification, and displaying the real-time image having the desired magnification on the electronic display screen.