Constrains two points together or a point to a curve (or an extension of a curve).
Access Methods
Button
Toolbar: Drafting tool set 
Parametric tool group Geometric Constraints flyout Coincident Menu:
Parametric
Geometric Constraints
Coincident
Summary
This command is equivalent to the Coincident option in GEOMCONSTRAINT.
A constraint point on an object can be made coincident with an object or a constraint point on another object.
Following are the valid constraint objects and points:
- Line
- Polyline segment
- Circle
- Arc
- Polyline arc
- Ellipse
- Spline
- Two valid constraint points
List of Prompts
The following prompts are displayed.
Select first point or [Object/Autoconstrain] <Object>: Select a constraint point, or an object, or enter ato apply constraints to selected objects
Point
Specifies a point to be constrained.
- First Point
-
Specifies the first point of the object to be constrained.
- Second Point
-
Specifies the second point of the object to be constrained.
Object
Selects an object to be constrained.
- Point
- Multiple
-
Picks successive points to coincide with the first object. The Multiple option is displayed when you use the Object option to select the first object.
Autoconstrain
Selects multiple objects. Coincident constraints are applied to selected objects with unconstrained points that are coincident to each other.
The number of constraints applied is displayed at the Command prompt.
When a coincident constraint is applied between a point and an arc or line, the point can lie on the line or arc or the extension of the line or arc.