Binder

The pick surface that connects component inputs to page data, live feeds and sheets.

Binding a button to behaviour rather than a value.

Data binding answers “where does this value come from”. Action binding answers “what happens when this is pressed”. A button's Event field carries its own bind button, which opens the action dialog instead of the Binder.

Action kindEffect
Unit actionSends a typed command to a unit — start a clock, increment a counter, reset a ticker.
Animation actionPlays a workflow.

The inspector prints a summary of the bound action under the Event field, so a button's behaviour is legible without opening the dialog.