Draft Constrain

Description
Apart from entering coordinates in the task panel of commands or using snapping, there is another feature called "constraining" to help you draw accurately in the Draft Workbench and the  Arch Workbench. After picking a point you can constrain the movement of the cursor to the X, Y, or Z direction of the current Draft working plane for the next point. This can for example be used to create a perfectly horizontal line.



Usage horizontal and vertical constraints

 * 1) Choose a Draft or Arch command to create your geometry.
 * 2) Pick a first point. A previous point is required.
 * 3) Do one of the following:
 * 4) * For a horizontal constraint: move the cursor to the left or right of the previous point.
 * 5) * For a vertical constraint: move the cursor above or below the previous point.
 * 6) Hold down.
 * 7) The cursor is now constrained.
 * 8) Pick the next point.
 * 9) If the command is still active: optionally release  to disable the constraint.

Usage X, Y and Z constraints

 * 1) Choose a Draft or Arch command to create your geometry.
 * 2) Pick a first point. A previous point is required.
 * 3) Press,  or  to specify the direction.
 * 4) The cursor is now constrained.
 * 5) Pick the next point.
 * 6) If the command is still active optionally do one of the following:
 * 7) * Press the same key to disable the constraint.
 * 8) * Press the key belonging to one of the other directions to use that direction instead.