From the Nemonic Scanner app, you can print to the 3” x 3” or 3” x 4” paper.
To change the shooting size, tap the icon above the Shoot button.
Tap the Shoot button, then the shade will be removed automatically, and the image will be scanned in the black and white form suitable to print.
To load an image from Gallery, tap the Gallery menu icon at the left bottom.
Similarly, the image will be converted to the black and white one suitable to print.