How do I use it?

you press ALT and it there should be a + symbol that pops up with the gui and you would either click "self" or the individual you are trying to perform medical on

You should hold alt

As it has a new system you hold alt and then there should be green names when you press on the person ur holding ur cursor over u get a guiwherr u can choose what go heal like legs, arms head etc. But now you need smr tk save you incase unconscois

Excellent spelling, @MaxMountain