PDF Editing Issues

How to Fix Text Selection Issues in Acrobat iOS Reading Mode

Elise WilliamsElise Williams Oct 27, 2026 868 views

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.

How to Fix Text Selection Issues in Acrobat iOS 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.
Before you start

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.

Solution 1Recommended

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.

1
Disable Reading Mode

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.

2
Locate the text

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.

3
Select the text

Tap and hold the desired text until the blue iOS selection handles appear on the screen.

4
Use iOS actions

Drag the handles to highlight the specific phrase, then choose 'Copy', 'Share', or 'Look Up' from the pop-up menu.

Switch to Standard Document View
Feature Restored: The standard document view enables the native iOS text selection menu to function normally across your PDF files.
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  1. 1. Install WPS Office: Download and open the WPS Office app on your iPhone or iPad.
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  3. 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.
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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.