Choose View > Invisible Elements to show or hide markers in the Document window that represent invisible elements such as anchors, comments, and scripts in the document's HTML code. Showing invisible elements lets you select and view them, and change their properties in the Property inspector.

Which elements appear when you choose View > Invisible Elements depends on the settings in the Invisible Elements panel of the Preferences dialog box. For example, you can display anchors but not line breaks.

Certain invisible elements (comments, anchors, and scripts) can be created using buttons on the Object palette and modified with the Property inspector.

This picture shows all the invisible element markers.

See also Invisible Elements preferences.