Resolution is adjusted by measuring the projected area on the Teflon film while positioning the projector. Area can be fine tuned by turning the focus / zoom. It’s best to leave the zoom in the middle first, and then move the projector to somewhere close to the resolution you need. Users can use a ruler to measure the size of the projected image. We will provide a calibration grid image to facilitate the size measurement. We will also provide two marks to identify resolutions of 37 and 100 microns.