Deep sky view filter by apparent size arcmins

I use sky safari to discover, plan, frame my astrophotography sessions like many others. It would be AWESOME if I could set the view to only show dsos above a certain arcsec size. Using a slider as per magnitude, etc from the biggest like andromeda, Barnard loop, down to 1 arc in. It would make discovering new nebula and galaxies big enough to shoot with a certain FL sooo much easier.