# About Customizing internal margin from the pdf document

**URL:** <https://pdfjs.community/t/about-customizing-internal-margin-from-the-pdf-document/1620>\
**Category:** Technical Support\
**Created:** [April 22, 2022, 9:34am UTC](https://pdfjs.community/t/about-customizing-internal-margin-from-the-pdf-document/1620 "2022-04-22T09:34:42Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [April 22, 2022, 9:34am UTC](https://pdfjs.community/t/about-customizing-internal-margin-from-the-pdf-document/1620/3 "2022-04-22T09:34:47Z")

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**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [Integrating PDF.js Express Viewer into a new Angular project - Prerequisites](https://pdfjs.express/documentation/get-started-viewer/angular/new-project#prerequisites)
- [Best practices for PDF.js Express - Preload the Web Viewer](https://pdfjs.express/documentation/learn-more/best-practices#preload-the-web-viewer)
- [Customizing PDF.js Express Viewer](https://pdfjs.express/documentation/ui-customization/overview)

APIs:
- [Core.DocumentViewer - setPagesUpdatedInternalAnnotationsTransform(handler)](https://pdfjs.express/api/Core.DocumentViewer.html#setPagesUpdatedInternalAnnotationsTransform__anchor)
- [ExpressUtils(optionsopt) - # async extract() → {Promise.}](https://pdfjs.express/api/utils/ExpressUtils.html#extract__anchor)
- [PDF.js Express Utilities](https://pdfjs.express/api/utils/index.html#__anchor)

Forums:
- [About Customizing Button position(2)](https://pdfjs.community/t/about-customizing-button-position-2/1610/1)
- [Pdfjs.express watermark despite licence key & correct domain](https://pdfjs.community/t/pdfjs-express-watermark-despite-licence-key-correct-domain/1592/1)
- [I have free license key (pdf express viewer), but still showing watermark](https://pdfjs.community/t/i-have-free-license-key-pdf-express-viewer-but-still-showing-watermark/1601/1)

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