Aperture Tip - Tabs in the Browser
I just blew my own mind. If you select more than one album/project/folder/etc. in the Inspecter by holding down the Command key, you’ll get tabs of each group in the Browser. You do need to have the viewer in either Browser Only or Browser & Viewer mode to do this, it won’t work in Viewer only mode.
Select more than one group of photos using the Command key.
Watch as tabs appear in the Browser! Magical.