Most often, data and events travel together. In most compositions, including the example below, the majority of cables are data-and-event (thick) cables. Whenever an event travels through one of these cables, it’s accompanied by a piece of data — like the color that travels from Select Input to Make Rectangle Layer.
The antenna symbols in this composition indicate a hidden cable from the Updated Window output port to the Window input port. To hide a cable, right-click on it and select .
When an event and its companion piece of data reach a node’s input port, the event causes the node to do its job, while the data affects how the node does its job. (This is explained further in How compositions process data.)
Data generally doesn’t travel through a node in the same way that an event does. Instead, the node, informed by its input data, produces other data as output.