Sorry for the auto-correct in the other reply that mangled your name...
I think the stretch might be saved in the project - not in front of v12 to test - so if you wanted to apply this automatically to another file, you'd need to use Automator, or get the version of Modeler that supports scripting.
The PDF import settings, such as starch option are not save in the project file, they saved in the model.
To test it save create a model using a PDF file. Make sure you change some of the PDF options, such strach.
Open a pdf file in Monarch, on the PDF import option, click on the cancel button, open the model that you saved previously, if you inspect the PDF/XPS option import you can see the old starch option.