Although the red and green markers are shaped as if one is shooting a bullet, the fact is that their area of influence is actually a diamond shape, or a square rotated 45 degrees. One can see this when placing one green marker in one photo and another one very close to it on another photo. Both photos of course need to overlap. the result of the influence show a blurry side of a diamond.
therefore I would like the cursor of the marker adaptable with one of the choices a outlined-diamond that shows me the area of influence of the marker. this should save me from a lot of guessing and running the preview option