Options for proofing (annotation on files)

I’m managing Graphic Design projects and need a good way to proof & comment on artwork within Monday at the item level since currently this only happens through email.

I see that you can annotate/make comments on an image file that is added to a files column but I was hoping that files/images uploaded in an Update could also be annotated on…is there any way to do that as I don’t see the option? I would prefer it in updates where I can @mention someone and keep track of all discussion/changes in one place and not have to add more columns.

Also, usually we use PDFs for review but the annotation feature only seems to work on images (jpg’s etc)…any timeline on when this feature may be available for other file types like PDFs?