What are the red squares and circles on topics?
The red squares and circles that appear when you hover over a topic represent where connectors can be attached to those particular topics.
Red squares
When you hover the mouse over a topic, you see red squares on the top, bottom, and sides. These indicate the possible positions for the origin of a connector.
Red circles
When you drag a connector from a red square origin of one topic toward another topic, you see red circles on the top, bottom, and sides of the destination topic. The red circles indicate where the connector can be attached to the other topic.
