Saving the screen on a Spectrum will typically get part of it obscured with the message “Start tape, then press any key.”: How might one save the screen image from Sinclair BASIC without it being corrupted in this way?
One simple answer is to copy the screen to a buffer elsewhere in memory and save it from there.
10 CLEAR 58455 ... generate the screen image here ... 900 FOR n=0 TO 6911 910 POKE 58456+n, PEEK (16384+n) 920 NEXT n 930 SAVE "image" CODE 58456,6912
It's also possible to disable the prompt immediately before the SAVE, by changing the input / output functions for the "K" device:
900 POKE 23734,111: REM suppress prompt 910 POKE 23736,20: REM don't wait for keypress 920 SAVE "image" SCREEN$