Command: 
Constraint Menu > Add Coincident constraint 

To add: 
Click Add Coincident Constraint, then click:


To delete 


Result: 
If the two sketchelements have more than two degreesoffreedom:
 or 
 or 
Note: If there is a total of 1 degreeoffreedom, then the two elements will not become 'coincident'. 

In MechDesigner, you cannot, remove more than two degreesoffreedom of a Point. For example, you cannot in do these two steps:
Why:
Thus, delete the constraint between the Point and the Line (STEP 1), before you add the constraint between the two Points (STEP 2). About Point Symbols
You may need to select the '+' or the 'O' with a command, and it is important to see the difference between the two Points and be able to select one Point or the other Point. When a centrePoint is Merged with a startPoint or endPoint of a Line or Arc, the symbol is a '+'. You cannot select one or the other, because there is only one Point.


See Also: 
Compare with MergePoints, Horizontal, Vertical 

Notes: 
Use Add Coincident between two Points for construction geometry. Use MergePoints for sketchloops and sketchpaths. Points that are 'coincident' give you the option to delete the Coincident Constraint later. 
Before 
After 
Select: 
In SelectionWindow & GeometryTree as... 


The Lines become colinear 
CoincidentLtoLn 


CoincidentPtoLn 





The Point is constrained to lie on the circumference of a Circle 
CoincidentPtoCn 

The Points become coincident 
CoincidentPtoPn 