The editor had an overhaul in Toad 12.7, in order to add some enhancements, which a list of can be found in the New Features section of the Toad 12.7 release notes
. The horizontal scroll bar in Toad’s editor is a byproduct of these enhancements. The scroll bar is always visible due to the default width value of the pixels in the editor. The scroll bar will extend as needed, but it will not get any shorter than it is when the editor is first launched.