Altium NEXUS Documentation


Created: June 12, 2017 | Updated: July 11, 2018
Now reading version 3.2. For the latest, read: EditClasses for version 5
Applies to altium-nexus versions: 1.0, 1.1, 2.0, 2.1, 3.0, 3.1, 3.2, 4 and 5
This documentation page references Altium NEXUS/NEXUS Client (part of the deployed NEXUS solution), which has been discontinued. All your PCB design, data management and collaboration needs can now be delivered by Altium Designer (with Altium Designer Enterprise Subscription) and a connected Altium 365 Workspace. Check out the FAQs page for more information.

Parent page: PCB Commands

The following pre-packaged resource, derived from this base command, is available:

Applied Parameters: None


This command is used to access the Object Class Explorer dialog in which you can browse and manage the defined object classes for the current PCB document. A class is a logical collection of a particular type of design object. For example, a group of related components could be grouped into their own Component Class which could then be used as the basis for creating a targeted design rule.


This command is accessed from the PCB Editor by choosing the Design » Classes command from the main menus.


After launching the command, the Object Class Explorer dialog will open. Use this dialog to define new classes or edit/remove existing classes with respect to each of the following supported class categories:

  • Net Classes
  • Component Classes
  • Layer Classes
  • Pad Classes
  • From To Classes
  • Differential Pair Classes
  • Design Channel Classes
  • Polygon Classes
  • Structure Classes
  • xSignal Classes


  1. A design object of a particular type can belong to (i.e. be a member of) any number of classes defined for that object type.
  2. Default (system classes) are distinguished by their names being enclosed in <>. These classes cannot be renamed nor can they be deleted.
  3. Whenever an applicable design object is created/placed in the design, it is added to the default <All> class for the respective class type.


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