Prinergy 7.5 - possible to change marks on the fly? June 27, 2017, 02:22:48 PM Using Prinergy 7.5 and Preps 7. We create our impos in Prinergy Workshop by choosing File>Create New Imposition... and then navigate to a pre-built Preps template, select the desired signatures, and click OK. I've noticed in the signature selection window there is a button called "Marks," and clicking it brings up a dialog where it appears that one can either add or remove marks without having to go to Preps and edit the template.I say "it appears" because I cannot make this work - if I try to either add or remove a mark Prinergy will not import or create the impo. I can't find any info on it in Help, so if anyone has any insight (JOE!) I'd be much obliged. This would be a very useful tool once we are up and running with our new press.