JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. (Technology Preview) To Apply a Horizontal 2D Constraint Select the Horizontal 2D Constraint tool ( Drawing > Constraints > 2D ). Select the element or segment you wish to constrain. The selected entity or segment is now set to the direction of the horizontal axis of the Global coordinate system. Parent topic: (Technology Preview) Horizontal 2D Constraint