You should know that :
- You can use the right mouse
button to popup context menus. A lot of features like cut
copy paste delete and importing/exporting can only be
found as context menus.
- In the skin editor; when you
hold down the CTRL key when you drag a skin vertex will
drag all skin vertices
- In the frame editor; when you
click on a triangle with the triangle tool holding down
the CTRL key will flip a triangle, the ALT key will flood
align all triangles with the triangle clicked.
- Only start flipping triangles
after you have imported all
frames froom your DXF or CAD file, or import the base
frame flip triangles export it and use that frame for all