sync text editor to shader editor to see notes relevant to the material or group.

At the moment you can associate notes with a material/group by using frame nodes, which is great for small notes, but if you have really complex shader and need pages of notes, then the frame would be too big because of it not having a scroll bar.

The text editor could be synced with the shader editor's visible material/group if the text editors 'sync to shader editor' option is enabled.

The top level of a material would get a note, and each group node would get a note. This wouldn't affect the functionality of the frame notes.