Select the capturing device and start scanning. You will be able to determine if the imagine should be captured in colour or in black and white, as well as establishing the output resolution.
But there´s even more, ScanRn allows you to select the area on the screen to be captured. Use the rubber tool which you will find in the right bottom part to activate the selection and click on it again to deactivate.
ScanRn also has an image preview option which will allow you to have a preview of the image which will be captured and a keyboard shortcut to copy the whole surface of the page and send it directly to the printer.
If you haven´t installed the scanner´s controller, you won´t be able to use the program.