Arbortext IsoDraw > User's Reference > Menus > Window Menu > Show Attribute Window > Editing Callout Styles > Selecting Style
  
Selecting Style
 
You can select a style by clicking the name of a style in the Callouts window. The current style is then indicated by a highlighted background.
Your selection has the following effects:
 
It changes the selected style into the current style
The current style functions as a preference for those callouts you still have to create.