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# Long description

The figure is a screenshot taken from the digital fluorescence microscope (DFM). The fluorescence micrograph was taken with the ×10 objective and shows seven elliptical nuclei in light blue. Each nucleus contains a white circle with the number one in it. These are markers from using the counter tool. Various controls can be seen underneath the micrograph: a thumbnail of the slide with arrows pointing to the right, left, top and bottom is shown on the left-hand side. In the centre, the counter tool is visible. One counter is activated, indicated by a tick next to the ‘Use tool’ box. The current count of seven is highlighted by a red box around the counted number. On the right-hand side is the measure line tool. The scale bar in the image indicates 10 micrometres.