Hi, how is it possible to setup an event based rule which is fired off two button clicks? E.g. conversion page which has save order button and continue order, I want to fire the same tag on both buttons. I'm not sure if I can have two element selections in the Element Tag or Selector field.
You'd want to create an event-based rule with a click event type. For the tag, you'd want to use a selector that was generic enough to match both buttons. Finally, you'll use conditions to ensure it only fires when appropriate. You could use something like the path condition to ensure it only fires on the pages where the button is located. If the buttons are on different pages, you can add multiple path conditions and they will function like "or" operators.
EDIT: Marking as correct as this answer best answers the general question. Additional responses are specific to this use case.