It seems that the area to click to resize the Desktop Panel Size is about two pixels thick. It sure would be nice if this was a bit thicker.
These Desktop Panels have to be adjusted due to the odd pinning behavior, how keyboard shortcuts (F2) are tied to both the bottom and right panels and cannot be controlled independently, and how Desktop Panels cannot be undocked. This makes manual adjustment even more important. It is already annoying having to manually adjust these window sizes, but then I'm given all of about 2 pixels to do this.
Toad for Oracle 13.3.0.181