D&D 5e by Roll20 - not critting poison damage

I want a way to enter the stats for a poisoned weapon on the character sheet so that *weapon damage* can crit on a natural 20, but not other damage (e.g. poison). At present the poison damage (Damage2 on the stats) also crits on a natural 20, which is confusing to players and GMs

Hi, Joanna. If you're playing 5e, then all damage dice resulting from a critical hit (including rolled poison damage) should be doubled. If you're in a different game, or if you homebrew otherwise, apologies! To do what you're suggesting, change the damage die in the Crit field for Damage 2 to 0d6. On a crit, you'll get the extra roll on Damage 1, and Damage 2 will pop up as, say, 2+0 (poison). The +0 isn't the prettiest solution, but it does the trick. If someone has a better way, I'm all ears! Hope this helped.

Actually, poison damage which allows for a saving throw is not considered weapon damage in 5e.

Yes. I can’t remember offhand if that is included in auto-damage rolls. Regardless, I presumed Joanna meant a typical case where a Drow blade does a certain amount of slashing and poison damage on a hit. That’s why I said “rolled” poison damage, although I see that was ambiguous. Should have said “non-save” damage.