Let’s begin with an example:
Usually everybody could use a dagger in a fight, but only a fighter should be able to make special attacks like a quick slash with it.
However if you simply give the fighter class a quick slash skill, they could use this skill all weapons, even heavy hammers (yes, it’s possible to restrict skills to certain weapons in RPGM, but that has other limitations).
The following tutorial shows a way to go around those problems without using scripts and notetags (as some of those might be incompatible with another script you need or because you aren’t comfortable around scripts).
The example uses weapon skills, but it can be done with every skill group.