Is there any workaround for naming objects in Omnigraffle Standard?

Naming objects seems like such a common and basic thing to do. Why do I have to go pro in order to name something on the design? Sure, hide all the rest of the pro features, but this one should be standard.

That being said, is there any workarounds that anyone knows of on the Mac? I have a stencil full of icons that are all named “Rectangle” and scanning it for the one I want can sometimes take 10 minutes! Being able to rename them so I can search it would be beneficial. Can I open the file in a code editor and change something? Thanks!