# What does the call to "https://pi.pdfjs.express/events" means?

**URL:** https://pdfjs.community/t/what-does-the-call-to-https-pi-pdfjs-express-events-means/1518
**Category:** Technical Support
**Created:** [March 30, 2022, 6:05am UTC](https://pdfjs.community/t/what-does-the-call-to-https-pi-pdfjs-express-events-means/1518 "2022-03-30T06:05:01Z")
**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: [March 30, 2022, 6:05am UTC](https://pdfjs.community/t/what-does-the-call-to-https-pi-pdfjs-express-events-means/1518/3 "2022-03-30T06:05:07Z")

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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:
- [Set up measurement tools](https://pdfjs.express/documentation/measurement/setup)
- [PDF.js Express annotations - Get started](https://pdfjs.express/documentation/annotation/overview#get-started)
- [Framework compatibility for PDF.js Express - Call APIs](https://pdfjs.express/documentation/learn-more/framework-compatibility#call-apis)

APIs:
- [Core - enableFullPDF()](https://pdfjs.express/api/Core.html#.enableFullPDF__anchor)
- [PDF.js Express Utilities](https://pdfjs.express/api/utils/index.html#__anchor)
- [Core.Annotations - setCustomSerializeHandler(annotationClass, serializeHandler)](https://pdfjs.express/api/Core.Annotations.html#.setCustomSerializeHandler__anchor)

Forums:
- [Do annotations from setCustomDrawHandler make it to the downloadable file?](https://pdfjs.community/t/do-annotations-from-setcustomdrawhandler-make-it-to-the-downloadable-file/927/3)
- [Importing XFDF has failed](https://pdfjs.community/t/importing-xfdf-has-failed/1006/1)
- [Get coordinates of X and Y of the signature image](https://pdfjs.community/t/get-coordinates-of-x-and-y-of-the-signature-image/1221/1)

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