Emailing 1000's of invoices out or Sage in error

I had a customer that wanted to email out invoice in Sage 300 but before she selected the range of invoices, she selected delivery method of customer and clicked print. OOOHHH NNNOOO!!  Panic!!. over 4000 invoices were going to either be printed or emailed to customers.

We used task manager to stop the processing,  but users do not have access to that option in all cases. Is there a fast efficient way to stop this process from continuing after you click that print button. Sage use to have a stop button at the top of the print preview but if you don't use the print preview, that won't work. Also, that button no longer exists.  Any suggestions?