Full Use Case:
Is possible to change the file name on all the documents. Can we modify the GDT (example GDT – 000004) standard to use letters instead? Our users find it hard to locating the file.

-You cannot modify the GDT-000x document action field as it is an autonumber and cannot be changed. But you can use the existing field called “Action Name” to provide description or name of an Document Action. You just need to drag this field onto your document action page layout if not already visible.