> For the complete documentation index, see [llms.txt](https://docs.heisenware.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.heisenware.com/release-notes/v87-explained.md).

# v87 — Explained

<div align="left"><figure><img src="/files/tPxL7AvRnUVj8oB26ZUj" alt="" width="375"><figcaption></figcaption></figure></div>

## Features

* Much improved documentation ([docs.heisenware.com](/welcome.md))
* In-app onboarding to get a smooth start
* Improved invitation emails
* Enterprise grade PKI (public-key-infrastructure) for [OPC UA](/app-builder/build-backend/functions/connectors/opc-ua-client.md)
* Drag & drop of backend [functions](/app-builder/build-backend/functions.md) directly onto [widgets](/app-builder/build-frontend/widgets.md)
* Full width [widgets](/app-builder/build-frontend/widgets.md) on single click
* [Modbus](/app-builder/build-backend/functions/connectors/modbus.md) connector
* Conditional (runtime) [form](/app-builder/build-frontend/widgets/input-widgets/form.md) fields
* On-the fly [relational data](/app-builder/build-backend/functions/storage/relational-database.md) extraction across multiple tables
* [Deregistration of Users](broken://pages/UFNcaTF4yaGQSJv34EFm#user-management) possible from the App Manager
* [SAP Digital Manufacturing ](/app-builder/build-backend/functions/connectors/sap-digital-manufacturing.md)connector

## Fixes

* Improved App Builder performance issues when used for very large apps
* Fixed [text box](/app-builder/build-frontend/text-icons-and-images.md#text-box) to always stay on top while building
* Protecting widgets from being dragged outside the [preview](broken://pages/blDW45ECaLEvV3KEsB1m) area
* Issues with [invite-only apps](broken://pages/UFNcaTF4yaGQSJv34EFm#access-management)
* Issues when using dictionary variables names for [Siemens S7](/app-builder/build-backend/functions/connectors/siemens-s7.md)


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