For non-renderer plugins such as highlighter, cursor, etc, they must be added maunally using add_plugins() method whenever needed. Those type of plugins do not actually do any rendering but adding additional features such as mouse over highlight, zoom in/out and mouse cursor.
List of non-renderer plugins:
Note that CanvasTextRenderer is a non-renderer plugin even it is suffixed with “renderer”. This is not an error. This is because it’s not a renderer by itself. It creates a HTML5 canvas in which other renderer plugins can be used such as CanvasAxisLabelRenderer and CanvasAxisTickRenderer.