Devendra Badgujar
Forum Moderator

Hi, 

If you want to sketch onto the face/edge of the wing you will first need to select the wing face which has that edge. After selecting the face go to sketch tab (shortcut key K) and sketch will get activated and than you can draw the rectangle from the edge. This surface created will than be parallel to that face/edge. Refer this Sketching — Part 5 video tutorial.

If the surface you think is not parallel or aligned properly you can correct it using the Move tool. Refer this Move Tool — Part 2 video tutorial.

Regards,

Devendra