I can't reveal more of the layer panel

[blogsofwardotme]

Hi, I have been using GIMP with the layer panel showing properly for a bit, so I must have touched something.
I need to bring up the layer panel to reveal more of it, and hide the panel above. I found that I need to "identify the thin line between 
the 2 panel, grab and drag up, which is pretty intuitive. I only have the 3 dots to grab, and I can't bring the panel any further up. Thank you.