[5E OGL] NPC crit range and crit dice

Is there anyway to adjust the crit range on the NPC version of the sheet to use 19-20? As well, an option to increase the dice damage of a crit? The PC sheet has this ability but I would prefer using the NPC sheet for simple stats for DM'n as well as using my existing macros templates geared for that sheet. 

There isn't really a good way to do either or those, but here are my suggestions for workarounds. For the crit on 19-20, you need to have the NPC always roll advantage. Then you can modify the attribute rtype to be  {{always=1}} {{r2=[[1d20>19 Unfortunately this means that you will only be able to use the second roll result (r2) rather than the first roll result (r1) and if the npc actually has advantage/disadvantage you will have to roll twice and use the proper result.  For the additional damage on a crit, you can use the action's On Hit 2 field, either as the additional damage or the total damage on the crit. However it would limit you to only being able to use 1 damage field per attack as the second field would need to be reserved for crits.