Change preview during OnAir

The project preview can be enabled or disabled by checking /unchecking the associated check box from Project list. That will not influence the On Air status of the project.

Modifying objects visibility in the Items window has a correspondent in the preview window, but it doesn't influence the OnAir mode until you push the Refresh button (update).

The same applies to any change in objects properties made in the preview window, not affecting the OnAir mode until pushing Refresh (update).