> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/changelogs/version-5/v5-1-0.md).

# Version 5.1.0 Changelog (2019-06-05)

World's #1 PDF SDK Library for Web, Mobile, Server, Desktop

## New

* Added a new instantiation function that returns promise when viewer is ready.
* Added new [constructor options](https://sdk.apryse.com/api/web/global.html#WebViewer__anchor): preloadWorker and extension.
* [signatureWidgetAnnotation.createSignHereElement](/web/digital-signature/interacting-with-signature-field.md)
* Added a warning message if samples are ran from file system
* Added support for auto-growing FreeText annotations.
* Added shouldDrawOverAnnotation option in [setWatermark](https://sdk.apryse.com/api/web/Core.DocumentViewer.html#setWatermark__anchor)
* Added [showErrorMessage](https://sdk.apryse.com/api/web/WebViewerInstance.html#showErrorMessage__anchor) API
* Added setAllowCreationOverAnnotation property on [polyline](https://sdk.apryse.com/api/web/Core.Tools.PolylineCreateTool.html) and [polygon](https://sdk.apryse.com/api/web/Core.Tools.PolygonCreateTool.html) tools
* Added [realtime collaboration sample](https://github.com/PDFTron/webviewer-realtime-collaboration-sqlite3-sample/) using WebSocket
* Added a new [FormBuilder sample](/web/get-started/guides/samples/full-apis.md#viewerformbuilder) to add form fields to a document in WebViewer.
* Added setLoadAnnotationsFromVisiblePages to optionally only load annotations from visible pages.
* Added support for setting readonly and required fields with embedded JavaScript.
* Added API [Annotations.Forms.EmbeddedJS.update](https://sdk.apryse.com/api/web/Core.Annotations.Forms.EmbeddedJS.html#update__anchor) to override the default behavior of Embedded JavaScript functions.

## Updates

* Updated sticky, polygon and polyine not to start drawing when clicked on top of another annotation
* Updated Marquee zoom tool to support zoom out
* Updated line annotation with a measure dictionary to be able to render custom font size, font color
* Updated pre-render and caching level for iOS

## Fixes

* Fixed issue with loading link annotations from Office documents.
* Fixed issue with loading a small number of linearized documents.
* Fixed issue where watermark didn't show up when downloading a document from WebViewer Server.
* Fixed issue with StreamingPartRetriever loading encrypted XOD files.
* Fixed issue with annotation replies not showing up if reply was imported separately before the parent.
* Fixed issue where readonly single line text fields would wrap when they shouldn't.
* Fixed issue with single points not being created from a tap using the freehand tool.
* Fixed issues with the AFNumber\_Keystroke function not matching the behavior of other PDF viewers.
* Fixed issue where permissionCheckCallback setting wasn't applied for notes initially
* Fixed issue where position sort strategy wasn't taking the orientation into account
* Fixed issue where downloadPdf API doesn't allow downloading office files


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