So you've created a number of pages. Now you want to create a "slideshow" of them. We call that a "playlist". A playlist is a sequence of pages, each with a certain playback duration. When playing a playlist, it will show each page in the configured sequence. When it finishes showing the last page, it will loop back again to the first page and start playing over again.
Add a page to a playlist by simply dragging a page onto the icon of a playlist. The page will be added to the end of the playlist If the playlist is open already, you can immediately drag the page into the desired spot. Change the order of pages by simply dragging them to their desired position in the playlist. Remove a page by dragging it out of the playlist.
If you click a playlist and select the "Edit" option you can preview a playlist by clicking the "Preview" button. The "Edit playback durations" button lets you set the playback durations of each individual page in seconds.
If you want to match the page playback duration with a video element on the page, be sure to check the video playback duration in the element info box in the page designer (the stopwatch icon).
Lastly, you can also select the desired page transition. It is important to note that if you are using a sequence of pages with a common background page in your playlist, that a fade transition is always used between those pages, regardless of what transition you select here.
Note that if you drag in a draft page the original version of the page will be published. The conceptual changes need to be approved first for them to become visible.
You might have noticed the special "Optional foreground page" slot on the right hand side. This is a special slot into which you can drag a page that is always shown in front of all other pages during playback. You can visualize this as a layer that permanently sits on top of all other pages in the playlist; the elements on that layer will be shown on top of the other pages.
Since a foreground page is permanently present during playback of a playlist, it is very well suited for elements that need to play permanently, like background music via the streaming audio app or a ticker with news, rss or own data. These are the same benefits as a background page has.
If you want to share content across dashboards, a very convenient option is to link to a playlist on another dashboard. You can do this by clicking Add > From other dashboard. The selected playlist will now show up as a "linked playlist".
The great benefit of this sharing method, is that updates made to the original playlist will automatically be reflected in this linked playlist.
In the Pages panel, adding a page from another dashboard behaves differently: that makes a simple copy of that page instead of linking to it.
When linking to another dashboard's playlist, the only thing that is not copied is its foreground page (if present). Instead you can now drag in your own custom foreground page. This gives you the option to slightly customize the linked playlist.