Admin Level - Webmaster
Go to your Events page.
Chameleon users: Click your Events tab in the top menu, or More... on the home page Events section.
New CMS users: In the side menu click Events & Competition > Team Events.
Click the Edit Commitment button for the meet.
Click the Committed Athletes tab.
Check the box(es) next to the event(s) to clear.
You may click Select All above the events to do that.
Above all the events, click the Clear button. This will remove the red checkmark(s) by those event(s).