Image forming apparatus with a display device for matching the image size with the copying sheet size

Claim 1

An image forming apparatus comprising: means for selecting one cassette which is detachably loaded in said image forming apparatus, each of said cassettes holding a plurality of copying sheets having a specified size and a specified feeding direction of said sheets; means for detecting said specified size and said specified feeding direction of said sheets contained in said selected cassette; means for selecting an operation mode in response to which a required image forming magnification factor is selected; and display means for displaying operation conditions of said image forming apparatus, said display means including: a display panel section including a plurality of first light-emitting indicating units for indicating the type of cassette selected, and a plurality of second light-emitting indicating units for indicating when said selected operation mode is mismatched with said selected cassette; and an indicating section including a plurality of symbols arranged to correspond to said first light-emitting indicating units, each of said symbols indicating the size of the copying sheets contained in said selected cassette, and a plurality of instructions in the form of characters arrranged to correspond to said second light-emitting indicating units, said instructions instructing an operator to replace said selected cassette when one of said second light-emitting indicating units is activated.