RETRO The Spectrum User Manual page 23

Options and settings
ZX Spectrum border size
The ZX Spectrum was renowned for having a colourful border around the gameplay,
particularly while loading programs from cassette where the border would flash with
stripey coloured lines. Games often set the border colour to match the gameplay and
so the border can sometimes play an important part of the gameplay experience, other
times the border is just a static colour.
This option allows you to set how much of the ZX Spectrum border is shown. If you have
selected a graphical frame to be displayed around the gameplay then you may want to
adjust how much of the ZX Spectrum border is displayed, from no border at all to full.
Choose Frame
To remove the black border surrounding the game play area, you can choose to have
the game play displayed within an attractive background.
Select Choose frame to reveal a carousel of frame images that you can browse using
O and P.
Press M to select an image, which will change the frame around the example screenshots
shown above. When you are happy with your chosen frame, press B to return to the
Display Options menu.
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