If an ordinate dimension is created with display name style set to None, this origin symbol will not display the name of the ordinate dimension, and without this name display, it is impossible to get to certain settings.
Solution (1) Right Mouse Button > Edit or Double click on any one of the ordinate dimension extension lines.
(2) Right Mouse Button over that highlighted extension line and choose Settings...
(3) In the Ordinate Dimension Settings dialog, go to Ordinate to set the Display Name Style or make any other desire changes.
Hardware/Software Configuration Platform: INTL64
OS Version: 1064