The Source tab displays the tags and values in the se-name.evnt file for all the information supplied for the screen event, where se-name is the name you gave to the screen event when you created it. As you make changes on other tabs in the screen event editor, the tags and values displayed under the Source tab change to match.

You can also make changes to the tags and values in the source file, and they are reflected on the appropriate tabs of the screen event editor.