You can view or find a class declaration when the cursor is on a class name.
This command views the class declaration if the database contains information about it. If you don’t parse the entire source you are working on, some classes will only be known to exist but the location of their declarations and definitions will not be known.
Works like SPC, except that it finds the class declaration rather than viewing it, so that it is ready for editing.
The same functionality is available from the menu opened with mouse-3 on the class name.