Causes two or more line segments to lie along the same line.

Button
Ribbon: Parametric tab
Geometric
panel
CollinearNot available on the ribbon
in the current workspace
Menu: Parametric
Geometric
Constraints
CollinearNot available in menus
in the current workspace
Toolbar: Geometric
Constraint
This command is equivalent to the Collinear option in GEOMCONSTRAINT.
Following are the valid constraint objects and points: