I was scanning a baseball card. I put a clear piece of plastic on the surface of the scanner to keep from getting it scratched. I centered the card right in the middle of the top of the scanner which is 9 inches.
The resulting scan was tilted.
If the middle and top of the card was "12 on a clock" the scanned photo looks like the middle of the top of the card is now at 11 on the clock, as if it got moved before it was scanned. But, after scanning I opened the lid and the card was dead center like I left it.
What is causing the scanner to see this card at the wrong angle?
I have not made any adjustments to the scanner. I have used it "as is" since getting it:
for documents, coins and baseball cards and it has been working fine.