Navigate to Dashboards in the main menu. From here you can see the list of dashboards you created and any dashboards that have been shared by others. To create a new dashboard, click the "New +" button.
When viewing a dashboard, you have access to a few options that let you change the display or view it in fullscreen mode.
Dashboards may be shared publicly in the same way as sharing graphs. From the Menu at top right, you can immediately share the current dashboard view or choose a custom view.