The AC bonus from 1/2 and 3/4 Cover works great, it's a simple +2 and +5 to total AC from the AC Modifier field. So per my chat with Support, they suggested adding a line item to Global Save Modifier and typing: @{dexterity_mod}+2 into the Roll box instead of a dice roll (+5 for 3/4 Cover, +2 for 1/2 Cover obviously). When I saved that and then clicked on the Dexterity Saving Throw item, I get "(1d20+1) + (1+2)" as the result, which this character has a +1 Dex Mod and no proficiency in this case. I tried changing it to the Dexterity Save variable and it didn't quite work either. For testing I typed in a flat +2 to the Roll field of my line item and it definitely added a flat +2 to all of the Saving Throw rolls. If there's a quick and easy way to give that +2 or +5 to a DexSave without having to uncheck it if the players need to do a different Save throw, that'd be super convenient. Or even better, to have a single checkbox for the two different forms of Cover to add AC and DexSave at the same time.