Outlook for Android: Unified user interface in text, image and zip previewers

Updated June 12, 2026: The same set of updates will also apply to the PDF previewer. Thank you for your patience.  Introduction To provide a more consistent and predictable file viewing experience, we’re updating the user interface for text, image and zip file previewers in Outlook for Android. These changes align text, image and zip previewers with the existing preview experience for Word, Excel, and PowerPoint files. When this will happen: General Availability (Worldwide): Rollout begins late April 2026 and completes by mid-May 2026 How this affects your organization: Who is affected: All users viewing text, image and zip file attachments in Outlook for Android What will happen: Users will see updated styling in text, image and zip file previewers to match other Office file previewers. The overflow action menu will:Display updated icons Use a revised action order consistent with Word, Excel, and PowerPoint previewers A new Expand button will appear in the action bar, making it easier to enter full-screen mode. The feature is enabled by default and does not change existing policies or workflows. What you can do to prepare: No action is required; the update is enabled automatically Optionally notify users and helpdesk staff of the UI refresh Update internal documentation or screenshots if applicable Compliance considerations: No compliance considerations identified, review as appropriate for your organization.