Image forming apparatus with a sheet-size specifying function

摘要

The present invention provides an image forming apparatus for reading an image on a document having a main scanning direction and a sub scanning direction and forming a copy image of the image on a copy image forming medium. When a sheet feeding section selects a manual feeding tray to feed the copy image forming mediums therefrom, an automatic document upsetting section two-dimensionally detects a size of a first one of the copy image forming mediums fed from the manual feeding tray. A controlling section controls a reading section to read the image in accordance with the detected size of the copy image forming mediums, and controlling the image forming section for forming the copy image on the copy image forming mediums.