Fields

At a Glance

This reference page is a practical guide to the Fields category of keywords available in Altium Designer schematic and schematic library query language expressions, showing what each keyword applies to, the correct syntax to use, and example queries that help you filter objects by specific properties such as Active, Alignment, ArrowKind, Author, AutoSize, and BorderWidth. It also makes clear where a property is valid and highlights that some newer keywords are present as placeholders for future filtering support, so you can quickly tell which entries are currently useful and which are not yet fully documented. Read on to find the exact keyword behavior you need and build more accurate schematic queries with confidence.

- Learn which Field-type keywords are available, what object types they apply to, and how to use their required syntax correctly.
- See example query expressions for common property-based filtering tasks in schematic and schematic library documents.
- Understand important limitations, including object-specific property support and placeholder entries for keywords that are not yet fully implemented.
Go Deeper with AI:

The Fields schematic query functions shown in the Query Helper dialog
The Fields schematic query functions shown in the Query Helper dialog

This reference page details the query language keywords from the Fields category available in schematic and schematic library documents in Altium Designer. For help on a specific query keyword, use the following collapsible sections or highlight (or click inside) any given keyword in the Query Helper or a Filter panel then press F1 to access its section.

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Contents
Feature Availability

The features available to you depend on which Altium solution you have – Altium Develop, Altium Agile Teams, Altium Agile Enterprise, or Altium Designer (on active term).

If you don’t see a documented feature in your actual software, contact Altium Sales to find out more.

Legacy Documentation

Altium Designer documentation is no longer versioned. If you need to access documentation for older versions of Altium Designer, visit the Legacy Documentation section of the Other Installers page.