Question:

How to download a viewable rendition in Vault PromoMats and Medical?

Answer:

Download Rendition permission is needed. 

To download a viewable rendition, click on the downward arrow next to the Ellipsis menu, and choose Viewable Rendition from the drop-down menu:

The file is downloaded on the user's local device. 

Related Documentation:

Vault Help Documentation: About Auto-Generated Viewable Renditions