Causes lines or pairs of points to lie parallel to the X axis of the current coordinate system.

Button
Ribbon: Parametric tab
Geometric
panel
HorizontalNot available on the ribbon
in the current workspace
Menu: Parametric
Geometric
Constraints
HorizontalNot available in menus
in the current workspace
Toolbar: Geometric
Constraint
This command is equivalent to the Horizontal option in GEOMCONSTRAINT.
You can select different constraint points on the same object or different objects.
The following are the valid constraint objects and points:
The following prompts are displayed.
Select an object or [2Points] <2Points>: Select an object or two constraint points