It's nice to have that bar out of the way at times such as when needing more space to work in larger documents. In Expert mode, you'll see a Photo Bin button in the lower left corner of your screen. That's it's on-off switch.
I HAVE THE SAME PROBLEM! I can't find any way to make it appear... the whole task bar along the bottom of the window is missing. I'll attach a photo of the bottom left corner. Please help! I can't fix it and I'm going crazy trying to figure out what happened.... it was there last night!!!
Common sense and past experience kicked in right after I posted my question---- I decided to QUIT Elements and relaunch. That brought it back. I wish I knew what I had done to cause the whole task bar to vanish in the first place.
Sorry to bother y'all. Maybe my experience will help someone else, though.