Tip: Windows Mobile — Browsing Full-Screen in Opera Mobile
The bigger the screen, the better the browsing, right? But if you can maximize the use of whatever screen you've got, well, that's a start. In Opera for Windows Mobile (we used a Moto Q), open a web page that interests you. Then, select Menu-->Display-->Full Screen. Lacking menus, now, you'll need this tip, too: when you're ready to exit full screen, press one of the soft keys, then click Menu-->Display-->Desktop.
To watch a video in full screen, launch the Windows Media Player and start the video file. Then, during playback, pressing the 0/+ key toggles full screen on and off. (Note, you can silence playback with the #/B key.)