Tutorial 3.2

Orthogonal Lines:

Controls lines from being drawn at various angles to straight lines. When the snap

grid is rotated, ortho mode rotates accordingly.
1. Press Function Key F8.
               or
2. Double Click ORTHO from the Status Bar.
               or
3. Press CTRL + L.

                                               

           Lines drawn with ortho mode ON are straight lines horizontally and vertically

at 90 degree. While lines drawn with ortho mode OFF are inclined lines.So if you want

to draw inclined lines put off ortho mode otherwise turn it on..