# Parts of PDF text are not displayed - like whiteout has been wiped across

**URL:** <https://pdfjs.community/t/parts-of-pdf-text-are-not-displayed-like-whiteout-has-been-wiped-across/1895>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [July 22, 2022, 10:45am UTC](https://pdfjs.community/t/parts-of-pdf-text-are-not-displayed-like-whiteout-has-been-wiped-across/1895 "2022-07-22T10:45:04Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![nickmyersdt](https://yyz1.discourse-cdn.com/flex031/user_avatar/pdfjs.community/nickmyersdt/32/628_2.png) [@nickmyersdt](https://pdfjs.community/u/nickmyersdt)\
**Post date:** [July 22, 2022, 10:45am UTC](https://pdfjs.community/t/parts-of-pdf-text-are-not-displayed-like-whiteout-has-been-wiped-across/1895/1 "2022-07-22T10:45:05Z")

</div>

**Which product are you using?**  
@pdftron/pdfjs-express-viewer

**PDF.js Express Version**  
8.1.1

**Detailed description of issue**  
Really odd issue, which I expect is not caused by pdfjs-express-viewer however I’m hoping that people on this forum may have encountered it before.

In short, a small number of Windows 10 / Chrome users have reported that when they view SOME of our PDFs, using pdfjs-express-viewer have this rather strange display issue:

 ![Capture](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/3480d209df72a9700a80239063a19046bd835a13.png)

Updating OS, Browser and Graphics Drivers have had no effect, neither has enabling/disabling Hardware Acceleration.

Users tell us that the “whiteout” disappears if they “zoom in a lot” (to the point where they can’t read it without a lot of scrolling).

Microsoft Windows 10 Pro 10.0.19044  
Google Chrome 103.0.5060.134  
NVIDIA(R) GeForce(R) MX330 with 2GB GDDR5 graphics memory

**Expected behaviour**

Text displays normally.

**Does your issue happen with every document, or just one?**  
SOME PDFs, not all.

**Link to document**  
Removed.

**Code snippet**  
N/A (I think)

Whilst no errors appear in Chrome, the issue persists in Edge, and this message appears:

```javascript
 TT: undefined function: 32 pdf.worker.js

```

Any ideas would be really appreciated.

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_[View the full topic](https://pdfjs.community/t/parts-of-pdf-text-are-not-displayed-like-whiteout-has-been-wiped-across/1895)._