# Merge API doesn't save PDF checkboxes **URL:** \ **Category:** Technical Support\ **Created:** [June 23, 2021, 5:37pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843 "2021-06-23T17:37:52Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\ **Post date:** [June 23, 2021, 5:37pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/2 "2021-06-23T17:37:57Z")
**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: - [Create fillable forms - Modify fields to readonly](https://pdfjs.express/documentation/forms/fill-form-fields#modify-fields-to-readonly) - [Support forms with PDF.js Express](https://pdfjs.express/documentation/forms/overview) - [Signatures with PDF.js Express - Get started](https://pdfjs.express/documentation/signature/overview#get-started) APIs: - [PartRetrievers.LocalPdfPartRetriever](https://pdfjs.express/api/PartRetrievers.LocalPdfPartRetriever.html#__anchor) - [PartRetrievers.ExternalPdfPartRetriever](https://pdfjs.express/api/PartRetrievers.ExternalPdfPartRetriever.html#__anchor) - [Annotations.WidgetFlags - new WidgetFlags(options)](https://pdfjs.express/api/Annotations.WidgetFlags.html#WidgetFlags__anchor) Forums: - [Save annotation, checkbox in a form](https://pdfjs.community/t/save-annotation-checkbox-in-a-form/685/1) - [Confirm output of trial form field merger](https://pdfjs.community/t/confirm-output-of-trial-form-field-merger/744/1) - [Merge Rest API - how to flatten PDF?](https://pdfjs.community/t/merge-rest-api-how-to-flatten-pdf/328/1) --- _[View the full topic](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843)._