Soldato
It's a bit dated by if you go on EXRX they have gifs of basically every exercise for a body part using a barbell, dumbbell or machines. Obviously gyms will have different brands and slightly different ways of adjustment but they all tend to look the same for a given function so if gives you an idea of what does what:
Back
Shoulders
Arms
Chest
Glutes/hips
Upper legs
Abs
Calves
Back
Shoulders
Arms
Chest
Glutes/hips
Upper legs
Abs
Calves