PDF Editing Issues

How to Show Original File Names in Acrobat PDF Thumbnails

Olivia MillerOlivia Miller Nov 3, 2026 868 views

Question details

The user wants to display the original source file names instead of continuous page numbers in the thumbnail pane of a merged PDF document.

How to Show Original File Names in PDF Thumbnails in Adobe Acrobat
Product
Adobe Acrobat
Device & OS
not provided
Scenario
Combining multiple PDF files into a single document and needing to identify each section by its original file name for easier navigation.
Observed behavior
Acrobat displays continuous page numbers in the thumbnail pane by default, without indicating the original source file names of the merged documents.
Before you start

Keep a list of your original file names and their corresponding page ranges handy before modifying the merged PDF. Ensure you have full editing permissions for the combined document.

Solution 1Recommended

Manually Add File Names as Prefixes Using Page Labels

Since Acrobat does not display source file names automatically in the thumbnail pane, you can manually rename the page labels for each section to include the original file name.

Page Labels allow you to customize how page numbers appear in the thumbnail view and page navigation toolbar. By setting a prefix for a specific page range, you can mimic the appearance of file names.

1
Open the Page Thumbnails panel

Click on the Page Thumbnails icon on the left navigation pane in Adobe Acrobat to expand the thumbnails view.

2
Select the page range

Select the thumbnail of the first page from the source file, hold the Shift key, and click the last page of that file's section to highlight the entire range.

3
Open the Page Labels dialog

Right-click the selected thumbnails and choose 'Page Labels' from the context menu.

4
Configure the prefix

Select 'Begin new section', change the numbering style to 'None', and type the original file name into the 'Prefix' box. Click OK to apply the changes.

Manually Add File Names as Prefixes Using Page Labels
Scripting Alternative: Advanced users can use JavaScript actions during the merge process to automate page labeling, though it requires custom script development as Acrobat lacks a built-in toggle for this.
WPS PDF Tools

Easily Manage Merged PDFs with WPS Office

Instead of manually editing page labels, WPS Office PDF can merge your documents and help you organize them efficiently. Using bookmarks is a much faster way to navigate merged sections than renaming thumbnails.

  1. 1. Open WPS PDF: Launch WPS Office and switch to the PDF tab.
  2. 2. Merge PDF files: Click on 'Merge PDF' from the toolkit, add the files you want to combine, and click 'Merge'.
  3. 3. Open the Bookmarks pane: Open the newly merged PDF and click the Bookmarks icon on the left sidebar.
  4. 4. Add file names as bookmarks: Navigate to the first page of each merged section, click 'Add Bookmark', and type the original file name to easily organize your document.
Easily merge multiple PDF files into a single document.Create and manage bookmarks to represent original file names for quick navigation.Seamless compatibility with Adobe PDF formats.Lightweight, fast, and free to download.
microsoft office alternative - wps office

Frequently Asked Questions

Is there a built-in feature in Acrobat to show file names in thumbnails automatically?

No, Adobe Acrobat does not currently offer a standard option to display the original source file names directly within the page thumbnails pane. You must use the Page Labels workaround or custom scripts.

Do Page Labels change the actual content of my PDF?

No, Page Labels only change how the page numbers are displayed in the thumbnail pane and the page navigation toolbar. They do not alter the text, images, or layout on the PDF pages.

Can I use bookmarks instead of page labels to identify source files?

Yes. Creating bookmarks for the first page of each merged section using the original file name is often an easier and more accessible way to navigate combined PDFs than changing page labels.