Legacy Platform knowledge base

The classic platform,
fully documented.

Preserved technical guidance for teams building, operating, and maintaining SpreadsheetWeb Legacy Platform applications.

203technical guides

10product areas

59release notes

Browse the knowledge base

Documentation organized around your work

Start with a product area, then move through its guides and technical references.

46 guides

App Creation

Guidance and reference material for app creation in the Legacy Platform.

Explore App Creation

Converted Applications Custom Applications Dashboards Designer Applications

5 guides

App Management

Guidance and reference material for app management in the Legacy Platform.

Explore App Management

Application Management Application-Level Data Restrictions Processes

12 guides

Data Management

Manage Legacy Platform application records, database tables, layouts, imports, exports, history, permissions, and data-processing workflows.

Explore Data Management

Columns Custom Triggers Data Filters and My Filter

4 guides

Users and Teams

Guidance and reference material for users and teams in the Legacy Platform.

Explore Users and Teams

Groups My Data (GDPR)Roles

25 guides

Developers

Extend and integrate the SpreadsheetWeb Legacy Platform with APIs, custom actions, extensions, application methods, and developer references.

Explore Developers

API Reference Custom Actions Deprecated Versions Extensions

8 guides

Administration

Guidance and reference material for administration in the Legacy Platform.

Explore Administration

Active Directory Administration Custom User Fields

59 guides

Changelog

Review SpreadsheetWeb Legacy Platform release notes and version history, including new features, improvements, compatibility changes, and fixes.

Explore Changelog

Version 1.0 Version 1.1 Version 1.2

17 guides

Other Features

Explore additional SpreadsheetWeb Legacy Platform features for formulas, files, integrations, visualization behavior, and specialized workflows.

Explore Other Features

Custom Worksheet Formulas

10 guides

Connectors

Guidance and reference material for connectors in the Legacy Platform.

Explore Connectors

DocuSign Dropbox Google Sheets

11 guides

Integrations

Guidance and reference material for integrations in the Legacy Platform.

Explore Integrations

Close Applications Copper Applications Creatio Applications

Recently maintained

Updated Legacy Platform guidance

Search the knowledge base

User Defined Functions (UDF)C# User-Defined Functions (UDF)Updated Aug 5, 2026 AdministrationServer Status in the Legacy PlatformUpdated Aug 5, 2026 API ReferenceAPI ReferenceUpdated Aug 3, 2026 API MethodsCloseDedicatedSession (Application-Level)Updated Aug 3, 2026 API MethodsCreateUser (Site-Level)Updated Aug 3, 2026 Web ServicesCreating a Web ServiceUpdated Aug 3, 2026