Right-click the shape to which you want to add data, and then click Properties. In the Custom Properties dialog box, enter the values you want, and then click OK.
Note The Name and Title custom properties appear in shapes by default. You can display other custom properties on shapes by setting display options on the Fields tab in the Options dialog box.
To add new custom properties for a shape, in the Custom Properties dialog box, click Define, and then specify custom properties for the data you want to enter.You can quickly view and add custom property data for shapes in your drawing using the Custom Property Window. On the View menu, click Custom Property Window. When you select a shape, the Custom Property Window displays the shape's custom properties.