Ability to add free text/other kinds of resistances and vulnerabilities on the sheet

Right now when you select if a character has resistances or is immune to something you select from a dropdown the kind of damage or select a box out of two choices, magical sleep and disease. I’d like to be able to specify, for example, that a character is resistant to bludgeoning damage, and adding something to that, like ‘apart from silvered weapons’ or ‘apart from magical attacks’.