How to Fix Text Selection Issues in Acrobat iOS Reading Mode
Question details
The user is unable to select, copy, share, or look up text using the built-in iOS dictionary while viewing a PDF in Acrobat's Reading Mode.

- Product
- Adobe Acrobat iOS
- Device & OS
- iOS
- Scenario
- Reading a PDF document on an iOS device and attempting to interact with the text using native iOS selection tools.
- Observed behavior
- Touching and holding the screen in Reading Mode yields no response; the native iOS text-selection menu (Copy, Share, Look Up) fails to appear.
Ensure your PDF document consists of real text and not just flat scanned images. If the document is a scanned image, you will need to perform Optical Character Recognition (OCR) before any text can be selected.
Switch to Standard Document View
Acrobat's Liquid Mode or Reading Mode may restrict native iOS text selection features. Switching to the standard view restores full functionality.
Reading Mode in Adobe Acrobat dynamically reflows text to fit mobile screens. However, this custom rendering can temporarily block the native iOS text-selection layer, preventing you from using Apple's built-in dictionary or copy/paste functions.
Tap the 'Liquid Mode' or 'Reading Mode' icon (usually a water drop or document icon) at the top of the Acrobat app screen to exit the mobile-optimized view.
Once in the standard PDF document view, scroll to the text you want to select and zoom in if necessary to clearly see the words.
Tap and hold the desired text until the blue iOS selection handles appear on the screen.
Drag the handles to highlight the specific phrase, then choose 'Copy', 'Share', or 'Look Up' from the pop-up menu.

Verify Text Selectability and Apply OCR
If text selection fails even in standard view, the PDF might be a flattened image requiring text recognition.
Read, Select, and Edit PDFs Easily with WPS Office for iOS
WPS Office offers a powerful mobile PDF reader with a highly compatible mobile view. It seamlessly supports native iOS text selection, allowing you to copy, look up, and share text without frustrating restrictions.
- 1. Install WPS Office: Download and open the WPS Office app on your iPhone or iPad.
- 2. Open your PDF: Locate and open your PDF document from your local files or linked cloud storage within the app.
- 3. Select text smoothly: Long-press any text to instantly trigger the native iOS menu to copy, share, or look it up using the Apple dictionary.

Frequently Asked Questions
Why doesn't the long-press gesture work in Acrobat Reading Mode?
Reading Mode often reformats text dynamically for mobile screens using a custom rendering engine. This process can temporarily disable the native iOS text selection layer, preventing gestures like long-press from triggering the copy or dictionary menus.
How can I tell if my PDF is an image or contains real text?
Try selecting a single word in the standard PDF viewing mode. If a selection box highlights the whole page instead of the specific word, your PDF is a scanned image and requires Optical Character Recognition (OCR) to make the text interactive.
Does Apple's 'Look Up' dictionary work on PDFs?
Yes, Apple's 'Look Up' feature works on PDFs as long as the application exposes the selectable text to iOS. If it is blocked by a specific reading view, simply switching back to the standard document view will restore the 'Look Up' capability.




