Audacity 1.3: Improved Toolbar Docking
In Audacity 1.3.2 and higher, you can easily dock, undock, and rearrange the location of all of Audacity's toolbars, including the selection bar. A new blue triangle visually indicates when you are about to dock a toolbar in a particular location.
First, click on the grabber to the left of a toolbar you wish to drag.
Drag the toolbar away from its original location.
If you release the mouse here, it will become a floating toolbar.
While dragging, position the mouse near an edge or between two other toolbars,
and a blue triangle appears, indicating a possible location you can dock the toolbar.
Release the mouse button near a blue arrow and the toolbar is docked in its new location.
Commands to hide or show toolbars are found in the View menu.