The pages can be displayed as "Background" page that is as main synoptic, or as "Popup" windows displayed above the background window to display, for example, commands or specific information.

The windows displayed as Popup can be Modal or Not Modal (Modeless). In the first case any other window that is not the popup window is disabled until you close the popup itself; in the second case it is possible to operate on all the open windows, even though the popup window to remain on top of the main window.

A single page can be viewed either as background or as a mimic of the popup window according to the activation parameters specified in the animation that recalls.

When you start the browser the start page is always displayed as a background page, without prejudice to the ability to recall it later as a popup window.