The new 2d drafting tools available in the v6.7Beta release on website.
1) Toggle ortho snap - tracks and snaps lines to 0,30,45,60 and 90 degrees.
2) Line from point and tangent to circle.
3) Line tangent to two circles.
4) Split curve at point.
5) Trim curves to other curves
6) Fillet lines.
7) Make corner between lines (not shown)
Now working to add basic dimensioning and dxf file export.