Use this feature to toggle between the unit label name and unit property list for the respective unit operation.
Click button. This will toggle the
unit label name to the selected unit property list. Clicking the button
again will retain the original unit display settings.
You can select unit property list by clicking Options-> Drawing Defaults/Unit Display. Select the desired unit property list from the Tooltip Display List drop-down list box after selecting the Unit Operation from the operations list. The user configured property list is also included in the drop-down list of the tooltip/toggle display list.