Abstract: A method for controlling fixing temperature of a fixing device capable of fixing a toner image on recording paper in an image forming apparatus. A fixing temperature of the fixing device is determined in response to a selected one of plural paper feeders. The fixing temperature is set low, if the paper path of the selected paper feeder is turned path. The fixing temperature is set high, if the selected paper feeder is a FRR paper feeder. Information to determine the fixing temperature in accordance with the selected paper feeder is stored in a memory in a fixing temperature controller, and the temperature is controlled by the controller.

Abstract: A variable magnification copier capable of copying an original document in a zoom magnification change mode when the size of the document and a desired copy size are entered on keys. The copier has an operation board which is provided with a dimensional magnification change mode key, a document size key, a copy size key, and a magnification change ratio and size data display. In a dimensional magnification change mode, the data display shows a document size and a desired copy size which are entered on the document size and copy size keys, respectively. Such size data are automatically provided with a decimal point, whereby the operation board does not need an exclusive decimal point key. Data appearing on the data display is switched over to size data without a decimal point, depending on the unit of the entered size.