Use a callout view shape that suits a particular purpose.
In a project, click View tabCreate panelCallout drop-down (Rectangle).
In the Type Selector, select the type of callout to create: a detail callout or a view callout (a callout view that has the same view type as the parent view).
To define the callout area, drag the cursor from the upper-left to the lower-right, creating a callout bubble as shown by the dashed line enclosing the upper-left corner of the grid.
To see the callout view, double-click the callout head .