Did your printer come with a program?
i'm not really sure, actually. it's an HP printer, and HP actually does have it's own "All-In-One" wireless printer app for android, which includes the ability to make a printer scan what ever is inside it and send the scan to the tablet. however this app was just on the app store (google play store), the printer doesn't actually have a recommendation for an app or anything.
It may have an option to change resolution of the scanned image
there are four resolution options in the app on my tablet, 75, 100, 200, and 300, and my attempted scans are all in 300, resulting in an image which i THINK is 300 pixels along the 8.5 inch side, and then some larger number of pixels along the 11 inch side. i can also scan from the scanning glass (as i have been doing) or through something called the "document feeder"? i have a feeling i know where that document feeder is, i just haven't used it.
ah okay so i reread your post and realized you might mean an option for changing scan resolution
on the printer itself. didn't think of that, i'll check.