How-to-contribute-to-using-gitlab.md

@@ -11,5 +11,6 @@
  - When development is complete
    - remove WIP status
    - Add "ready for code review" tag
-   - contact fellow developer for approval, or discuss in meeting
+   - contact fellow developer for approval (e.g. write '@username please review' in the MR discussion), or discuss in meeting.   
+You can also assign the MR to the developer for review.
  - When approval has been given (see [Code Approval Procedure](Code-Approval-Procedure)) , merge MR