I'm going to throw a +1 on this. I understand that it's a sheet suggestion, and Roll20 doesn't code all of the sheets. But for the ones they do, including the 5E and forthcoming D&D2024 sheet, it would be nice to have. As a player, I've managed to forget this from time to time, and as a DM I have players who never remember (and yes, I could use a script, but I've had enough scripts break on me just before a game that I try to avoid them most of the time). And yes, some way to select which ammo would be used for players carrying multiple types, would be important.