I'm working my way back down the family tree, looking for living relatives. It'd be really great if I could mark branches complete so I'm not tempted to go back and re-check it later.

Specifically, I have a few deceased couples with no children. It would be great if there was some kind of marker to indicate that, so anyone in the family doing research wouldn't be tempted to go searching.

Likewise, it'd be great if some cards could be flagged for future research so helpful family members knew what to take up when they had time.