Developers can now choose whether PDF files or images appear first when users preview mixed attachments in the chatter side panel. This helps businesses tailor the document review experience to their workflow without changing the visible interface for end users.

task:https://www.odoo.com/web?#id=37703&view_type=form&model=project.task&action=327&menu_id=4720
pad: https://pad.odoo.com/p/r.8c6b85bec5c462ec32cd56ca724bae88