Sharp AR-M230 ユーザーズマニュアル

The print image can be rotated 180 degrees.
This feature is used to enable correct printing on envelopes and other paper with flaps that can 
only be loaded in one orientation.
Use this feature when automatic rotation (which takes place when the loaded paper is the same 
size as the print image and the orientations are different) results in reversal of the top and bottom 
of the image.
To use the feature, select the image orientation in "Image Orientation" on the "Paper" tab, and 
then select the "Rotate 180 degrees" checkbox.

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See 

 for details on how to open the printer driver.

The procedure for loading paper is explained in operation manual for copier.