A B C

If #1 travels A to C and #2 go via B. We turn a line into a planar.

AutoCAD tip:how to remove eductional stamp

AutoCAD tip

Save .dwg without student educational license stamp:

1. Open .dwg in licensed version of AutoCAD.
2. Type 'dxfout' - this will export the .dwg as .dxf file which doesnt have the stamp.
3. Type 'dxfin' - this will import the dxf which doesnt have the stamp.
4. Save as .dwg

In short: open > dxout > dxfin > save