There are a few ways to reorder docs in PropDisc. They are:
Drag and Drop single document
Drag and Drop multiple documents
Reorder by number
Here is a short video demonstrating how to use the feature: https://www.loom.com/share/249356bb400d400abf6ce83f3b02ac1b?sid=17f9f2f5-63ac-4636-b62a-f84f7b9fe81b