How to Restore Normal PDF Page Size After an Accidental Shortcut on Mac
Question details
The user needs to revert an unintended change to their PDF document where subsequent pages became unusually long and blank due to an accidental keyboard shortcut.

- Product
- PDF Editor
- Device & OS
- Mac
- Scenario
- Editing or viewing a PDF document when a keyboard shortcut is accidentally triggered, altering the document's page layout.
- Observed behavior
- The first page retains its standard size, while the remaining pages in the document transform into unusually long, blank pages.
Before attempting to fix the document, check whether you have already saved the file after the accidental layout change. Unsaved documents can be quickly reverted without needing advanced editing tools.
Close the Document Without Saving
The fastest and most effective method to undo the page size alteration if you have not yet saved the document.
If you realize the mistake immediately and haven't hit 'Save', the easiest way to restore the original formatting is to discard the current session's changes. This will revert the document to its last saved state.
Click the red close button in the top-left corner of the window on your Mac, or press 'Command + W'.
When the prompt appears asking if you want to save the changes to the document, click 'Don\'t Save'.
Locate your original PDF file and open it again. All pages should now be restored to their normal size.

Use the Undo Shortcut
Instantly revert the accidental keystroke immediately after it happens.
Restore Using Crop and Page Size Tools
If the file was already saved with the incorrect dimensions, you must manually adjust the page sizes back to normal.
Easily Manage PDF Page Sizes with WPS PDF
WPS Office includes a robust PDF editor that makes adjusting page sizes, cropping unwanted blank space, and fixing layout errors straightforward. If you accidentally distort your PDF, WPS PDF provides the exact tools needed to restore it quickly.
- 1. Open your PDF in WPS Office: Launch WPS Office on your Mac and open the PDF document that has the distorted page sizes.
- 2. Access the Page tools: Navigate to the 'Page' tab on the top ribbon to view all page management and layout options.
- 3. Adjust and crop pages: Select 'Page Setup' or 'Crop Page' to redefine the dimensions of the unusually long pages, applying the standard size to the affected range.

Frequently Asked Questions
What keyboard shortcut causes PDF pages to become unusually long on a Mac?
This usually happens when users accidentally trigger a combination of shortcut keys related to custom page setup, printing formats, or continuous scrolling layout toggles specific to the PDF reader they are using.
Can I recover the original PDF if I already saved the file with the long pages?
Yes. If you saved the file, you can restore a previous version using macOS Time Machine backups, or you can use a PDF editor's crop and page setup tools to manually remove the extra blank space.
Why did only the remaining pages change size but not the first page?
Many PDF editors allow layout and dimension changes to apply to specific page ranges. The accidental shortcut likely triggered an action that applied 'from the current page onwards' or 'from page 2', leaving the initial page untouched.




