Fujitsu DL3800 manual Clearing the Print, Buffer

PRINTING

CLEARING THE PRINT	Press the LOCK andÊ FONT buttons simultaneously to clear all data
BUFFER	from the print buffer. This method is useful when you cancel a print
	operation and do not want to continue printing data already sent to
	the printer.
	This method does not change or clear MENU1 and MENU2 settings,
	resident font locked state, paper loading position settings, and
	downloaded fonts.

4-10 User's Manual