OGL 5e sheet - Question

SO.... I have about 100 or so monsters in a game in their character sheets, some have 'Roll with advantage' clicked, others don't, some have 'show character name' in the sheet, some don't. - Its a mess. - Is there a way I can globally switch this one way or another in just a few clicks? I was thinking of using chatsetattr but from looking through the attributes list, I can't see which 'attribute' this would reference.. if any? Any ideas? Thanks!  

EDIT: Oh, I've found 'rtype'! this looks hopeful.

Yes, you can use ChatSetAttr to accomplish this, but you can also use the Game Settings (outside the VTT) in conjunction with the Apply Default Settings button inside the Player Settings (inside the VTT, the Chat Window's right-most tab, towards the bottom under Experimental Features). To update all existing character sheets.

Ah. I didn't realise i could edit existing sheets in the game settings. Cheers.