You have selected one or more connections
You have various editing options. Some examples:
You can calculate a new alignment for the connection(s).
You can insert angles for the connections.
You can change the connection alignment by overlapping angles of a selected connection.
For each model, you can specify whether the alignment of connections is to be right-angled or straight.
You can display tooltips for connections.
You can change the graphical representation of the connection. Right-click the connection and select Format > Representation. The Connection appearance dialog opens.
You can transfer the format of a connection to other connections.
You can reroute connections.