What happens when we select "Use Source Document" checkbox in Journeys config

Summary:

When creating a document type task in Journeys, we can select a checkbox that says "Don't copy. Use Source document" WHat does checking this box actually do? The performer is still able to download the document so, in a way, they can copy this document.

How can we put documents for read-only purpose in Journeys tasks?

Content (required):

Restricting document download and making the document "read-only" for the Asignee.

Version (include the version you are using, if applicable):23B

Code Snippet (add any code snippets that support your topic, if applicable):