FedEx Tracking Number into the Tracking Number field

Hello all, we usually enter in the UPS tracking number at the Shipping Data Entry Screen under the "Tracking..." button.  We open this button and scan the UPS Tracking number from our label into the tracking number field.  I was trying to the do the same thing with FedEx labels as we are shipping more FedEx these days.  I found that the tracking number on the Fedex labels are much longer and the entire tracking number does not fit within the field?  Is there a way to lengthen that field?  Can someone please advise?  Thank you!