How can you measure basil leaves in cups?

Is that “put the leaves in the cup” or “put the leaves in the cup and press them down” or “roughly chop the basil leaves and put them into the cup” or “finely chop the basil leaves and put them into a cup”?

Using a slide rule is all very well, but you only really need it if you’re using daft measurements like cups and spoons. If you just use grams and millilitres you don’t need one.