Image forming apparatus

Claim 1

An image forming apparatus comprising: an optical means (14-19) for optically scanning a document and transmitting light beams from said document for forming an optical image of said document; magnification ratio setting means for setting the magnification ratio between said optical image size and said document size; wherein said magnification ratio setting means comprises a first magnification ratio setting unit which includes at least one magnification ratio setting key (791-79r,) for setting a specified magnification ratio, and a second magnification ratio setting unit whichincludes a magnification ratio increasing key (81 1 ) and a magnification ratio decreasing key (81 2 ), each of said keys being used for setting a desired magnification ratio; and control means for controlling said optical means (14-19) in such a manner that an optical image having a magnification ratio set by using said first and/or second magnification ratio setting units is projected on a photosensitive medium (20), characterized in that when said magnification ratio increasing key (81 1 ) or said magnification ratio decreasing key (81 2 ) is operated continuously for a first time period, said magnification ratio is increased or decreased by a first predetermined value of magnification ratio, and when said magnification ratio increasing key (81,); or said magnification ratio decreasing key (81 2 ) is operated continuously longer than said first period of time, said magnification ratio is increased or decreased by a second predetermined value of magnification for each preselected time unit exceeding said first period of time.