The Baseline operator disables all of the operators below it within its own event.
Sometimes, in order to step through an event to see how it’s affecting particles, you may want to disable and then progressively re-enable operators in the event from top to bottom. This can be a tedious process if your event has a large operator stack. The Baseline operator allows you to quickly disable all other operators below it within an event. The Baseline operator is not allowed to overwrite an existing operator in an event, so you don’t have to worry about accidentally dropping it on top of another operator as you move it around.