I've encountered this scenario a couple times now; both as a player and more recently as a DM; but I would love to see Roll20's tokens be able to somehow track altitude. I don't mean just adding a little wing decal; but I mean be able to display a "current altitude" number to the players or have the players track one that I can see. With either airborne or underwater actions; this becomes way more relevant than one might initially think. I thought at first I could use the "bar" system for this: but unfortunately, it doesn't display visible numbers to the players, only to the DM, so that doesn't work so well. for this purpose unless I say; say "okay, 100 percent is 100 ft., calculate as such."; but that lacks specificity. ... If there's currently a way to do this and I'm just dumb; please tell me.