How navigation buttons work

When the button is active, clicking it starts the corresponding action that is set on the

Navigation Button Properties

dialog box. If the button is inactive, clicking it causes no response.

Whether the button is active or inactive depends both on the configured action of the button and the position of the current opened graphic display in the navigation history list. For example, if the button is configured to show the next graphic display and the current shown graphic display is the first one in the navigation history list, the button is inactive. When the current shown graphic display is not the first one in the navigation history list, the button is active.