Learn how to add a crosswalk.

1. In the Profile page, click Sources perspective.
2. Click Legend.
   The Legend tab is displayed.
3. Click Add Crosswalk.
   
4. From the Source System Name drop-down list, select the source system to be added.
5. Click Add.
   The selected source system is added to the list and the same can be seen under the different views with a different color code.