# Some problems while customizing my own ui

**URL:** <https://pdfjs.community/t/some-problems-while-customizing-my-own-ui/1999>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [September 1, 2022, 3:05pm UTC](https://pdfjs.community/t/some-problems-while-customizing-my-own-ui/1999 "2022-09-01T15:05:47Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [September 1, 2022, 3:05pm UTC](https://pdfjs.community/t/some-problems-while-customizing-my-own-ui/1999/3 "2022-09-01T15:05:52Z")

</div>

**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:
- [How to customize viewer - What option should I choose](https://pdfjs.express/documentation/ui-customization/customizing-setup.8#what-option-should-i-choose)
- [Manually Download & integrate PDF.js Express Plus - Integrate into your application](https://pdfjs.express/documentation/get-started/manually#integrate-into-your-application)
- [Core engine for WebViewer - Creating your own UI using WebViewer Core](https://pdfjs.express/documentation/ui-customization/core#creating-your-own-ui-using-webviewer-core)

APIs:
- [UI.Header - getItems()](https://pdfjs.express/api/UI.Header.html#getItems__anchor)
- [UI.Fonts - addSignatureFont(font)](https://pdfjs.express/api/UI.Fonts.html#.addSignatureFont__anchor)
- [UI.Popup - update( [items])](https://pdfjs.express/api/UI.Popup.html#update__anchor)

Forums:
- [I want to customize the viewer with the css file I wrote](https://pdfjs.community/t/i-want-to-customize-the-viewer-with-the-css-file-i-wrote/1628/1)
- [Import fails after editing freetext annotation](https://pdfjs.community/t/import-fails-after-editing-freetext-annotation/289/1)
- [I cannot use PDF.JS Express to open a PDF file by url in a Vue Project, please help me figure out how is that happen](https://pdfjs.community/t/i-cannot-use-pdf-js-express-to-open-a-pdf-file-by-url-in-a-vue-project-please-help-me-figure-out-how-is-that-happen/660/1)

  
  

Share how you are using PDF.js Express in your organization you could win a **$500 Amazon gift card. All participants will receive 6 months of PDF.js Express+ for free**. Learn more [here](https://utm.guru/ueQNw)

---

_[View the full topic](https://pdfjs.community/t/some-problems-while-customizing-my-own-ui/1999)._