A:AnswerWith the Brother DS-640, you can only insert one page into the scanner at a time. Insert the next page only after the first one is completely scanned.
A:AnswerYes, the Brother DS640 is able to scan receipts from major retailers using the included software. The machine will have markers on the feeder to show were to insert the paper.
A:AnswerYes, the Brother DS640 is compatible with Microsoft surface. Below is a link with all the compatible operating systems for the Brother DS640.
Answer Link: https://support.brother.com/g/b/oslist.aspx?c=us&lang=en&prod=ds640_us_eu_as
A:AnswerIt cannot be used as a standalone. It needs a computer. (A related model with a micro-SD slot in the front, can scan to that micro-SD, though I am not quite sure that it can do that without a computer to direct it!)
As for enlarging, if the scan cannot be auto-enlarging, then at least the image can be easily enlarged afterward in MS Paint on windows, or by other means. You would need to set the software that manages the scan, to enlarge or reduce, before starting the scan, so it would depend upon what software you used, I think! more than on this Brother scanner itself.
