I’ve looked this up, and can’t really find the answer, but is it possible to say have a input Mask that only accepts Limited characters?
Example
~ ~ ~ ~
In the four slots above, I would like Slot 1 to only be a 1 (which I know I can set) Slot 2 to only accept A-S & 1-9 , Slot 3 to accept a-c and the fourth slot can be anything.
so something like 1AC9 would be an acceptable answer.
You can use an input mask in conjunction with a validation rule:
This will not force an upper case in slot 2, but an input mask will: