An image forming apparatus determines if a support function key is pressed down or not. When it is determined that the support function key is pressed down, the image forming apparatus determines if the read document is a one side document or a both-side document. Then the document is read and operable operational conditions are selected based on the read document and the information about an intended use that is inputted by a user. The selected operational conditions are displayed on an operating unit for each operational condition. As a result, it is possible to provide an image forming apparatus wherein the user can set a desired operational condition easily suitable for the user's intended use without omission and fail.