Time for action — flipping the window header
At the top or bottom of each of the windows there is a bar. It has the Current Editor Type button on the left side and some other buttons, as you can see in the following screenshot:
This is called the Header. Each of the 16 types of editor windows has different buttons in its header:
Click the right mouse button (RMB) on an empty area of the Header. A menu will pop up that says Flip to Top.
Select Flip to Top with the left mouse button (LMB).
What just happened?
The Header can be at the top or the bottom of the window. If it is at the bottom, you can flip it to the top. If it is at the top, you can flip it to the bottom. Set it the way you prefer.