You can add special description to any field within a form – tooltip. This description can be used as a hint for users where required field format is described, for example.
Go to Virto Form Extender Settings of a required list and add new settings.
Enter the text which will be displayed as a field description in the “Field tooltip” block. Click “Save” to save the settings.

Note: do not forget to use “Enable extender for this list” to apply the settings to your list.
Now users will see the description of this field when they view or edit list or add a new item to it.

It is also possible to leave an URL in field description. URL should be entered in HTML format. For example, if you want to add a link to your company site, the HTML code should look as follows:
<A HREF="mycompany.html">My Company</A>

And the link in a field tooltip will look as follows.
