How to scan different size receipts in MF Scan Utility

[tres]

I just upgraded my printer from PIXMA MG7520 to imageClass MF753Cdw. I mostly used it for scanning documents and receipts using the scan utility software from Canon. My old MG7520 which uses IJ Scan Utility has an "Auto scan" option on the Paper Size dropdown. The Auto scan helps a lot on scanning different size documents like receipts, IDs, **bleep**, etc., just place it anywhere in the platen glass and the output image will always be cropped properly base on the size of the scanned item. My problem is this new printer MF753Cdw which uses the MF Scan Utility (winmfscanutilityv12102.exe) cannot scan different size documents because there is no Auto scan option on Paper Size. Please let me know if there is another way to do this. I've attached images for both IJ Scan Utility and MF Scan Utility.

IJ Scan Utility with Auto Scan

MF Scan Utility with no Auto scan