nevermind, I figured it out. you have to press enter to finish the move and then type it in and press enter again.

okay, I just watched the video on how to array components. it seems easy enough except I can't figure out where/how to type in the commands!!
for example, say I want to make 50 copies of a group. where do I type "50x"? in the Measurements input box? whenever I put an x or a / in the measurements box it says "invalid distance entered". I can't imagine you just type the commands into thin air after moving the object.
any help appreciated, this is frustrating