This illustration shows the Travel Request Process editor, which contains the following:

Two equal horizontal regions called swimlanes.

The top swimlane is labeled Employee and the bottom swimlane is labeled Manager.

Each swimlane contains a flow element (left to right) and a sequence flow.

The process starts at the left end of the Employee swimlane with the Submit Travel Request start event.

There is a sequence flow from Submit Travel Request to the Travel Request Complete end event in the Manager swimlane.

The following items are bordered in red to call attention to them:
Submit Travel Request event
Travel Request Complete event