I create a two-image slide in powerpoint and then store it as a jpg file and then crop away the excess.
I believe this type has already been shown on this thread, but here is an example with finders patina.
Victor, that is a really nice Crispus page with many good examples. If someone wants to see what is possible when collecting Crispus AE3s, that would be a great page to visit.
Here is one way. Three images are in play, the obverse, the reverse, and a blank image. Create a large blank image (maybe just white) to duplicate and use again and again. With the obverse picture, draw a box around the coin outlining the region you want to show (I use a square a bit bigger than the diameter of the coin) and "copy" it. Open the blank image and "paste" the obverse onto the blank. Drag that obverse square to the side a bit if necessary. Go to the reverse image and do the same, that is, copy the region and paste it onto the formerly blank image and move it alongside the obverse. Now you have obverse and reverse side-by-side with extra blank image all around. Crop the resulting side-by-side image on the formerly blank page to the right size and name it descriptively.