editing in bulk

I need to add the AlbumArtist information for my entire collection. I have been pasting in the info for each file, once at a time, which is HUGELY time consuming. Is there anyway to edit each album (or even all albums for a particular artist) at once instead of having to do each file separately??

Select all the files you want to edit and enter the information in the tag panel (usually on the left side).
Then use "File > Save tag" to apply the changes.

thank you! I never saw the tag panel; must've hidden it when I first launched.