The present invention relates to an image forming apparatus such as a copying machine.
Recent image forming apparatuses such as copying machines have various functions. Parameters which represent such functions as the copying number, the copying paper size, the copying magnification, the copying density and the like will be referred to as image forming instructions hereafter. When such a copying machine is manufactured or is placed and used in an office, it may be necessary to check all the functions of the copying machine. A conventional checking operation is performed in such a manner that after all the functions of the copying machine are manually set at all possible values, a copying start instruction (depression of a start key) is provided. For this reason, the checking operation becomes complex and time-consuming according to the various functions of the copying machine.