You can now apply/fire an event template against multiple prospects at once in Heap CRM:
Just like an import, export or email, this applies to what you are looking at. So if you apply this to the all leads view, it will fire the event template against all leads (i.e. you probably don't want to do this). If you are looking at a particular category, it will fire against that category and if you are looking at a particular managing user it will fire on the transactions where the selected user is a managing user.