I cannot print in the Big Sur format with my Canon Pro 100. Anybody got any ideas??

First check with Canon to see if they support the printer in Big Sur, if they do please download their most up-to-date drivers. However if you are using strictly Canon software to print and Canon does not have up-to-date drivers I'd recommend the following:

Please do the following in this order:

·Uninstall all Canon software, put in the Trash and empty the Trash.

·Please reset the printing system per Reset the Mac printing system to solve a problem

·Next, follow the instructions in Adding a printer

The Canon Pro-100 printer is supported by the Big Sur built-in Apple AirPrint, and there would be no further need to seek driver or software support from Canon. When you re-add the printer, choose AirPrint for the driver selection.