If you have chosen this viewing mode, then the document will be displayed in the current document window exactly as it would be printed with the current printer settings. Thanks to this you have extremely valuable control possibilities that allow you to check your print parameters. Apart from the "Inverse output" parameter you can check all other parameters of the Print dialog, including the colour separation, rasterizing, imposition (mount) settings and fine-data incorporation.
If several pages are shown simultaneously in the Print preview (e.g. in double-page mode or because an imposition scheme has been activated), then a double-click of the left mouse button on a page calls up the relevant page in the normal document layout view. This saves you from having to call up the View popup again to perform this change.
If in addition to the double-click you hold down a [Shift] key, you will land up directly in the master page that is assigned to the selected document page.