You can make any object/page in your publication do something by creating one or more actions for it. All the actions available in Opus can be set up as either:
automatic – that is they happen when the object appears, or
interactive – that is they happen in response to the user interacting with the program in some way, such as clicking on an object or pressing a key on the keyboard.
Note:
As well as making things happen with actions you can also do the following:
Objects such as video, sound and slideshows can be set up to start automatically.
All objects can be set up to show themselves after a specified amount of time using a combination of the Initially Hidden and Show after settings on the object’s General tab of the Properties dialog.
Objects can also appear and disappear with a special transition effect or can scroll on and off the screen. These are set up via the Transitions tab of the Properties tab.