Connectors can be customized with different styles to represent different types of connections between screens—they can have different colors, and can either be solid or dashed whilst they can have arrow ends or point ends.
To customize a connector, you can simply select it, and the style options will appear on top of the connector.
Just to give you some ideas, our users tend to use the red color to indicate error paths, or the gray color with the dashed style to indicate paths that go backward in a flow. The connector with arrow ends can also be used to specify the endpoint and the direction of the flow.
💁♀️ Flows support Undo for all actions! Simply use the shortcut ⌘ + Z / Ctrl+Z in order to undo the action.