As of version 3.2.08, you can now set specific pages where you want uiPress to load fullscreen. This is useful if uiPress if the page is normally fullscreen and doesn’t require the admin menu and toolbar.
To do this, go to site settings and select the advanced tab. Here you will find the ‘Enter fullscreen on pages’ option.

This option accepts absolute urls, relative url’s or query parameters separated by a comma. For example, if I wanted to load the pages table and the default dashboard fullscreen, i could enter edit.php?post_type=page
, index.php

Now when I access these pages, they will be loaded fullscreen automatically.