Click (and drag) to position the angle that will be used with the "Oblique Draw" tool.
This tool is operated in a freehand fashion.
This tool is only available with "complexity" (expertise level) set to 'Advanced'.
See also: 1-Point Draw, 1-Point Select, 2-Point Draw, 2-Point Select, 3-Point Draw, 3-Point Select, Isometric Line, Dimetric Select, Dimetric Draw, Trimetric Select, Trimetric Draw, Oblique Draw, & Perspective.
Tux Paint 0.9.32