# Cannot view existing information in a pdf form **URL:** \ **Category:** Technical Support\ **Created:** [November 8, 2021, 2:05pm UTC](https://pdfjs.community/t/cannot-view-existing-information-in-a-pdf-form/1163 "2021-11-08T14:05:45Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\ **Post date:** [November 8, 2021, 2:05pm UTC](https://pdfjs.community/t/cannot-view-existing-information-in-a-pdf-form/1163/3 "2021-11-08T14:05:50Z")
**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: - [Open a document from Blob](https://pdfjs.express/documentation/basic-operations/open-document/blob) - [Support forms with PDF.js Express](https://pdfjs.express/documentation/forms/overview) - [Add signature fields to PDFs](https://pdfjs.express/documentation/signature/signature-field.8) APIs: - [Core.Tools.SignatureCreateTool - addSignature()](https://pdfjs.express/api/Core.Tools.SignatureCreateTool.html#addSignature__anchor) - [Core.Tools.CropCreateTool - cropApplied](https://pdfjs.express/api/Core.Tools.CropCreateTool.html#event:cropApplied__anchor) - [Core.Annotations.TextWidgetAnnotation - isVisible()](https://pdfjs.express/api/Core.Annotations.TextWidgetAnnotation.html#isVisible__anchor) Forums: - [Cannot view existing annotation on pdf](https://pdfjs.community/t/cannot-view-existing-annotation-on-pdf/1159/4) - [Cannot view existing annotation on pdf in PDF.js Express Viewer](https://pdfjs.community/t/cannot-view-existing-annotation-on-pdf-in-pdf-js-express-viewer/1160/1) - [Merge API doesn’t save PDF checkboxes](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/1) --- _[View the full topic](https://pdfjs.community/t/cannot-view-existing-information-in-a-pdf-form/1163)._