https://wiki.roll20.net/Dice_R...Dice_.28B.2CF.29_rCP
/r 1d10r<2+2
the r<number between the dice size and plus. I think
/r 2d20d1
is the command for rolling two d20's and keeping the higher one
confusing as d =dice but then d = "drop lowest"
so like. #dice size d #of dice you want to drop (favoring higher rolls).
Part of my personal confusing is the seemingly identical purposes Keep commants.
like, k is keep larger. kl is keep lower.
d is drop lower. dh is drop higher.