What is a callout?
Callout topic is a descriptive topic that has the same properties as any other topic. It can be added to any topic except the Central one. It is placed above a selected topic. In addition, it can be added to an external relationship when it is placed in the center of the relationship. You can add a callout by selecting the topic to which you want to add a callout and clicking “Callout” in the right menu.
