How to Highlight All Occurrences of Text in a PDF
Question details
The user wants a faster way to find and highlight every instance of specific text, such as an order ID, within a lengthy PDF file.

- Product
- PDF Editor
- Device & OS
- not provided
- Scenario
- Searching for and identifying repeated terms or order IDs across a long PDF document to make them stand out.
- Observed behavior
- Highlighting each occurrence manually by scrolling through the document is inefficient and time-consuming, requiring a bulk search-and-highlight approach.
Ensure your PDF document is text-searchable and not a scanned image. If it is a scanned document, you will need to perform OCR (Optical Character Recognition) first to make the text recognizable.
Use Advanced Search to Find and Highlight Text
Utilize the built-in search functionality of your PDF reader to locate every instance of the text and apply highlights systematically.
While many PDF editors do not offer a one-click 'highlight all' button, using the Advanced Search pane allows you to quickly jump between occurrences and apply highlights without losing your place in a long document.
Open your PDF document in your preferred PDF editor. Press Ctrl+F (Windows) or Cmd+F (Mac) to open the Find tool, or select 'Advanced Search' from the Edit menu for a comprehensive list of results.
Enter the specific text, keyword, or order ID you want to find into the search bar and press Enter.
As you navigate through the search results using the 'Next' button, select the text and click the 'Highlight' tool from the quick menu or the main annotation toolbar.

Highlight and Edit PDF Text Easily with WPS Office
WPS Office provides a powerful, lightweight PDF editor that allows you to quickly search, highlight, annotate, and manage long PDF documents without hassle.
- 1. Open PDF in WPS Office: Download and install WPS Office, then open your PDF file using the WPS PDF tool.
- 2. Search for Text: Click on the 'Search' icon in the sidebar or press Ctrl+F to find the specific word or phrase.
- 3. Select the Highlight Tool: Navigate to the 'Comment' tab on the top ribbon and choose the 'Highlight' tool.
- 4. Highlight Occurrences: Quickly navigate through your search results and highlight the required text seamlessly.

Frequently Asked Questions
Is there a one-click button to highlight all occurrences of a word in a PDF?
Most standard PDF readers do not offer a single button to highlight all occurrences automatically. You typically need to use the search function to find the text and apply the highlight to each result.
Why can't I search or highlight text in my PDF?
This usually happens if your PDF is a flat scanned image or has restricted editing permissions. You will need to use an OCR (Optical Character Recognition) tool to convert the image to searchable text, or unlock the document if it is password-protected.
Can I change the highlight color for different search terms?
Yes. In most PDF editors, you can select the Highlight tool and change its color properties from the toolbar before highlighting, allowing you to categorize various terms or order IDs with different colors.
How can I remove highlights from a PDF?
To remove a highlight, simply click or right-click on the highlighted text and select 'Delete', or click the trash can icon from the floating context menu.




