You can edit the help text that is shown as a tooltip. By default, there is no help text and no help icon.

The help text appears when hovering over the   icon with the mouse.

This feature allows you to add an explanation or help text to a form element. By default, the help text is empty. Once you enter a help text, you will see a help icon   appear next to the form element. When the user hovers over the help icon with the mouse, the help text is shown as an overlay. 

To change the design of the help icon or the overlay bubble, create your own CSS theme.