It is convenient to always have an electronic copy of a document with you when you scan a document. It is convenient to always have an electronic copy of a document available to you. You can also scan copies of your documents through your printer, whether you're running a business or need to do so for other reasons. If you're wondering how to scan with Canon printer using MF Toolbox, follow the below steps:

First, you are required to select one of the scanning options while the MF Toolbox is open.
When you click on "Mail," the scanned document will be attached to your email application. If you click on "OCR," the document will be scanned and analyzed by the OCR software.
Then you need to click on "Save" to save the document to your computer. The "PDF" option permits you to save the scanned document as a PDF file.
Using the scan settings dialog box, you can specify the scanning parameters for the document to be scanned. After making the necessary changes, click "Scan" to begin scanning.
If you find issues like why my Canon printer won't scan, then check the communication between both devices. Moreover, use the updated drivers while scanning documents.
For More Info: https://printeranswers.com/why-wont-my-canon-printer-scan/