This example demonstrates using a tooltip to display the note. In this case I'm using the jQuery-ui tooltip and activating the tooltip in a custom "onAdd" callback and setting the "onShow" callback to noop. Note that the jQuery ui tooltip widget seems to always require a title attribute on the tip target even if it isn't used for the tip. Also I haven't found a simple way to make the tip persist so you can interact with its content, eg click a link.