# When Form auto-zoom on Mobile the Pinch doesn't work well

**URL:** <https://pdfjs.community/t/when-form-auto-zoom-on-mobile-the-pinch-doesnt-work-well/1866>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [July 13, 2022, 7:23am UTC](https://pdfjs.community/t/when-form-auto-zoom-on-mobile-the-pinch-doesnt-work-well/1866 "2022-07-13T07:23:57Z")\
**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:** [July 13, 2022, 7:24am UTC](https://pdfjs.community/t/when-form-auto-zoom-on-mobile-the-pinch-doesnt-work-well/1866/3 "2022-07-13T07:24:02Z")

</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:
- [PDF.js Express Plus Overview - What is PDF.js Express Plus?](https://pdfjs.express/documentation/get-started#what-is-pdf.js-express-plus?)
- [PDF.js Express Documentation - Our Products - PDF.js Express Plus](https://pdfjs.express/documentation#pdf.js-express-plus)
- [Adding your license key - PDF.js Express Plus License Keys](https://pdfjs.express/documentation/get-started/add-license-key#pdf.js-express-plus-license-keys-<span-class='plus'></span>)

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

Forums:
- [Manage zoom in mobile using pinch](https://pdfjs.community/t/manage-zoom-in-mobile-using-pinch/1523/1)
- [Not able to validated the license on hybrid mobile app](https://pdfjs.community/t/not-able-to-validated-the-license-on-hybrid-mobile-app/1156/1)
- [Problem retrieving annotations from sqlite3](https://pdfjs.community/t/problem-retrieving-annotations-from-sqlite3/1617/1)

---

_[View the full topic](https://pdfjs.community/t/when-form-auto-zoom-on-mobile-the-pinch-doesnt-work-well/1866)._