[5e OGL] 5e - Doubling crit dmg instead of rolling an extra die

As the title states. I've tried *2 in the crit dmg field for the 5e character sheet, and it does not work at all. Is there a way to do this?

Are you speaking of the OGL 5e sheet? I don't think there is a way to do that because the crit damage is rolled in a separate section form the regular damage. You could put the whole calculation in the crit section and ignore the regular damage when you roll a crit. Right now it rolls say 1d8 regular + 1d8 for the crit. You could make the crit field 1d8*2 and ignore the first 1d8 damaged rolled in the template output.

Yes, this is the OGL sheet.