PDF Editing Issues

How to Restore Normal PDF Page Size After an Accidental Shortcut on Mac

Huda QurayshiHuda Qurayshi Nov 5, 2026 868 views

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.

How to Restore Normal PDF Page Size After an Accidental 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 you start

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.

Solution 1Recommended

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.

1
Close the PDF file

Click the red close button in the top-left corner of the window on your Mac, or press 'Command + W'.

2
Discard changes

When the prompt appears asking if you want to save the changes to the document, click 'Don\'t Save'.

3
Reopen the document

Locate your original PDF file and open it again. All pages should now be restored to their normal size.

Close the Document Without Saving
Quick Fix: This method ensures that no permanent damage is done to your file layout, saving you the trouble of manual cropping.
Advanced PDF Editor

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. 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. 2. Access the Page tools: Navigate to the 'Page' tab on the top ribbon to view all page management and layout options.
  3. 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.
Intuitive page cropping and resizing toolsFully compatible with standard Adobe PDF formatsEasy-to-use Undo features to revert accidental formattingLightweight software optimized for both Mac and Windows
microsoft office alternative - wps office

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.