Is there a possibility to change the base die of a skill check?

[Fuffelschmertz]

I recently started to run DCC, which is a new system for me. AFAIK skill checks are just attribute checks, but if the character is untrained in something their base die is d10. The default die, when grabbing it from the character sheet is a d20. Can this be changed on the fly by using a modifier or something like this? Maybe there is something to do a -4d just the like modifiers in the bottom left (since d20 -4d should be d10)

[Mortar]

You mean like this? Bottom left of the screen.

Screenshot 2024-10-23 165326.png

[Fuffelschmertz]

Yeah, I know about this. But I need a -4d modifier, not a -3d