The Ray Command

Toolbar	custom
Pull-down	DrawRay
Keyboard	RAY

The Ray command creates a line similar to a construction line except that it extends infinitely in only one direction from the first pick point. The direction of the Ray is determined by the position of the second pick point.

Command Sequence

Command: RAY
Specify start point: (pick the start point)
Specify through point: (pick a second point to determine direction)
Specify through point: (to end or pick another point)