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How to Set the Default Zoom Level for SharePoint PDF Previews
Question details
The user wants to configure the default zoom level for PDF previews in the SharePoint information pane to Window Width or 100 percent.
- Product
- SharePoint Online
- Device & OS
- not provided
- Scenario
- Previewing PDF documents rapidly within the SharePoint details/information pane.
- Observed behavior
- The SharePoint details pane automatically resets the PDF preview zoom level to Window Height every time a different document is selected, ignoring the user's previously set zoom preference.
Verify that you are using the modern SharePoint library experience, as classic views handle file previews differently. Note that native web previewers often rely on hardcoded display defaults.
Submit a Feature Request via the Microsoft Feedback Portal
SharePoint Online currently does not offer an out-of-the-box setting to change the default zoom level in the details pane. The official recommendation is to submit product feedback.
Microsoft engineers actively monitor the feedback portal for user suggestions. Because the zoom level reset is an intended design behavior of the current SharePoint viewer, raising its visibility through feedback is the most direct way to encourage a permanent software update.
Navigate to the official Microsoft SharePoint Feedback Portal in your web browser.
Click the 'Sign In' button at the top right and log in with your Microsoft 365 credentials.
Use the search bar to look for 'PDF preview zoom' to see if other users have already requested this feature.
If you find an existing request, click the 'Vote' button. If not, click 'Send feedback' to create a new submission detailing your need for a default Window Width or 100% zoom setting.
Bypass the Details Pane by Opening PDFs Directly
Instead of relying on the limited information pane, open the PDF in a full browser tab or desktop application to maintain better control over your zoom settings.
Enjoy Advanced PDF Viewing and Editing with WPS Office
Since SharePoint Online cannot save custom zoom levels in its native preview pane, syncing your library and using a dedicated desktop application provides a much better reading experience. WPS Office is a lightweight, fully-featured alternative that remembers your exact PDF viewing preferences.
- 1. Download and install: Get the free version of WPS Office from the official website and complete the quick installation.
- 2. Sync your SharePoint files: Use OneDrive to sync your SharePoint document library to your local computer.
- 3. Set as default viewer: Right-click a synced PDF file, select 'Open with', choose WPS Office, and check the box to always use this app.
- 4. Enjoy personalized zooming: Open your PDFs in WPS Office, set your zoom to 100% or Page Width, and the software will remember your preferences for a seamless reading experience.
Frequently Asked Questions
Why does SharePoint reset the PDF zoom level to Window Height?
SharePoint's details pane is designed to give users a quick, at-a-glance overview of a document. It defaults to 'Window Height' to ensure that the entire vertical length of the page is visible without requiring the user to scroll.
Can I use a browser extension to force a default zoom in SharePoint?
While some browser extensions can enforce global zoom levels across web pages, they generally cannot override the internal script parameters of the embedded PDF viewer frame used within the SharePoint details pane.
Is it possible to change the default PDF viewer within SharePoint Online?
No, SharePoint Online uses its own proprietary file viewer for the web interface. To use a different viewer with custom zoom capabilities, you must either download the file or sync the SharePoint library to your local PC and open it with a desktop application.
