Suppose you have entered the MIRROR command. At this point, what is the fastest way of obtaining help on this command?

Suppose you have entered the MIRROR command. At this point, what is the fastest way of obtaining help on this command?

Suppose you have entered the MIRROR command. At this point, what is the fastest way of obtaining help on this command?
Suppose you have entered the MIRROR command. At this point, what is the fastest way of obtaining help on this command?