How to Get Update error when sketch is under constrained??

In CATIA, When we working in sketcher workbench and many time don't create or forget to create fully constrained but its too important to have fully constrained sketch so we can change settings which shows an error for sketch under constrained.

Steps for change setting:-

Step 1:- Go on tools and select options.

Step 2:- Go in "Mechanical Design" Select "Sketcher"

              Check/Select option on " Generate update errors when the sketch is under- constrained"

Select Ok to save setting.

-> From now, When you will exit from sketcher without fully constrained, it will an error for under-constrained.

Some Video Tutorials for CATIA:-