Right now on the patron record the print slip and print quick slip are both customizable, but the print summary is not. I say this should also be a customizable via the notices & slips feature.
If this was implemented bug 11869 would not be necessary.
Still valid and wanted :)
This is definitely something libraries would like to be able to edit from the Notices and Slips interface in tools.
+1 This would be really useful.
+1 Yes. This would be awfully useful.