Tool options not docking with Tool Box

[GraphiteGuru]

Hello, my first post/question (ever) to this group. I have been using Gimp on and off for several years but am only moderately knowledgeable about it. 

Recently my tool options became detached from my tool box (probably from some tinkering on my part), and nothing I can find or do is allowing it to "dock" again, although it plainly says below the tools that I can dock it there. Dragging it there by the top tab (as I understand suggestions I found on-line) only puts it there, floating above the tools. What miniscule step(s) am I missing?

By the way, I am working with the Surface Pro 4 and the version of the Surface Pen that has the clip (would that be the Surface Pen 3?)

[Ofnuts]

What do you call the "top tab"?  Is that clearly different from the title bar? Normally

• When you drag the window should be replaced by a small square with the icon and the name, noting more. If you are moving the whole window you are not dragging by the inner tab.
  
• The whole area should turn blue when you can drop.
  
• And what is important is your dragging handle, that should clearly enter the drop zone.
  

[rich2005]

Some screenshots here:

https://www.gimp-forum.net/Thread-Gimp-I...02#pid4702

[GraphiteGuru]

(12-30-2017, 07:53 PM)rich2005 Wrote: Some screenshots here:

https://www.gimp-forum.net/Thread-Gimp-I...02#pid4702

Thank you, that seemed to do the trick. I guess in 64 bit the top tab was so small I failed to notice it.