PURPOSE: To easily recognize operation contents and to improve the operability of an editor by turning on lamps corresponding to the contents instructed with a mode key of an indication input part and allowing the set mode, etc., of the editor to be confirmed.

CONSTITUTION: Plural mode keys such as an ON switch 8 for the editor, a masking switch 9, a trimming switch 10, a multiple switch 11, an area specification switch 12, a data IN switch 13, and a cancel switch 14, etc. are arranged at the instruction operation part 7 of an electrophotographic copying machine, LEDs corresponding to respective modes are provided, and LEDs corresponding to a mode key pressed with an instruction pen illuminate. Consequently, the setting mode of the editor can be confirmed without looking at the operation part of a main body. and the operability is improved.