Use the filter field beneath the swatch in the Node Editor to filter out attributes. For example, if you want to isolate the color related attributes, type "col" and only attributes that contain the letters "col" are displayed.
You can filter by entering either the attribute long name or its UI name, for example: Subdivisions Axis or subdivisionsAxis.
To toggle between showing and hiding the filter field, click in the toolbar. The filter field is disabled by default in custom mode (mode 4). Click to display it.