The best replacement for full screen is widescreen.

The best alternatives to full screen are rated as following:
★★★★★  widescreen
★★★★★  widescreen dvd
★★  letterbox
★★  wide
★★  widescreen better
★  pan and scan
★  widescreen movies
★  wide screen dvd
★  widescreen movie
★  windowed
★  wide screen
★  full screen exclusive
★  anamorphic widescreen
  windowed mode
  half screen
  widescreen format
  presentation mode chrome
  windows mode
  widescreen version
  widescreen edition
  full frame
  standard screen
  windowed performance
  window mode
  keep original aspect ratio
  wide screen movies
  widescreen dvds
  wide screen format
  letter box

Your alternative for full screen is not listed? Suggest!
Speaking about full screen, one probably shouldn't forget about f11.

Other search terms related to full screen and their ratings are:
★★★★★ f11
You have in mind a companion for full screen and it is not yet here? Propose!



Google Trends

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full screen
widescreen
widescreen dvd