Hiding System Classes You can hide unused or default system classes to simplify the Classification design tree. This helps you find relevant components and symbols. To hide system classes: In the ribbon, click Library > Classification management . In the Classification management dialog box, click Classes visibility . In the Classes visibility dialog box, select the classes to hide: Select all / none Components Cable references Macros Title blocks Click OK. Hidden classes remain visible in the Classification Management dialog box but are removed from library and selection interfaces. Custom subclasses under system classes stay visible to preserve the hierarchy. Parent topicWorking with Classifications and Class