Ok, I misunderstood the phrasing then... I just use a black sharpie and draw a circle around the center of each egg, then it is quick and easy to check for new donations. Ours do their sitting and hatching in the coop also most of the time, so checking daily for extras is needed.
Yep, I had considered moving the broody and her eggs to a smaller coop below the main coop but the upper coop is the roosting area and right now being warmed by a couple of light bulbs at night due to the wet, cold temps we were having causing some frost bite in two of the roosters who didn't have the sense to stick their heads under their wings. The temp stays in the mid 20s so I'm sure it is more comfortable for her as we are having colder temps this week after having temps in the 60s last week. Very strange winter here where we are.
My plan is that once the chicks hatch and they leave the nest, we can move them down to the smaller coop where they will be safe from being trampled by the other birds yet be able to see one another as it has a floor level window in it.