Refreshed Web Interface > About the Item View > The Item View User Interface > Tooltips
A tooltip is displayed when you click the icon for fields, states, and item types. It disappears from view once you click anywhere on the user interface. The global description defined on the Type, Field, State is seen in the tooltip. Descriptions can be overridden to have in-context descriptions. For more information, see the topics To set a type override for Fields and To set a type override for States.
In the Refreshed Item View, a tooltip description has a character limit of 1024.