> 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 28 Aug 2025
## Features * Major documentation improvements on our [Product Docs](https://docs.heisenware.com/) portal. * Added interactive, in-app onboarding to help new developers get started inside the [App Builder](/app-builder/overview.md). * Redesigned and improved invitation emails sent to new users. * Added enterprise-grade PKI (public-key infrastructure) security support for the [OPC UA Client](/app-builder/build-backend/functions/connectors/opc-ua-client.md) connector. * Directly drag and drop backend [functions](/app-builder/build-backend/functions.md) onto widgets to connect them instantly. * Expand [widgets](/app-builder/build-frontend/widgets.md) to full width on the canvas with a single click. * Introduced the [Modbus](/app-builder/build-backend/functions/connectors/modbus.md) connector. * Configure conditional runtime visibility for fields inside the [form](/app-builder/build-frontend/widgets/input-widgets/form.md) widget. * Extract data from a [relational database](/app-builder/build-backend/functions/storage/relational-database.md) across multiple tables on the fly. * Deregister users directly in [Users and access](/app-manager/users-and-access.md) inside the [App Manager](/app-manager/overview.md). * Introduced the [SAP Digital Manufacturing](/app-builder/build-backend/functions/connectors/sap-digital-manufacturing.md) connector. ## Fixes * Optimized [App Builder](/app-builder/overview.md) performance when designing very large Apps. * Fixed the [text box](/app-builder/build-frontend/text-icons-and-images.md) component to always stay on top of other elements on the canvas while building. * Prevents widgets from being dragged outside the canvas boundary in the Frontend Builder. * Resolved access and permission issues with invite-only options in [Users and access](/app-manager/users-and-access.md). * Fixed addressing issues when using dictionary variable names inside the [Siemens S7](/app-builder/build-backend/functions/connectors/siemens-s7.md) connector. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.heisenware.com/release-notes/v87-explained.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.