| 摘要 |
An image forming apparatus has two exposure control modes, automatic and manual, and a controlling section to switch the mode from one to another. When the exposure control mode is switched from automatic to manual, the medium value of the exposing degree range, from which the user may choose, is controlled to be equal to the exposing degree determined in automatic mode. However, if the exposing degree was not determined when in automatic mode, or if its change of the original is detected, e.g., in case of job interruption, a predetermined value is fixed to be the median of the exposing degree range.
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