Users can now view PDF and image attachments from the chatter alongside a form on large displays. This makes it easier to review related documents without leaving or scrolling away from the main record.

Task: https://www.odoo.com/web?#id=40663&view_type=form&model=project.task&action=333&active_id=131&menu_id=4720
PAD: https://pad.odoo.com/p/r.87a7ead0f01433057eaae2b3f0735dc5