For a better overview, you can hide connections.
Prerequisite
You have modeled at least one object in the column and in the row header.
Procedure
Click Display symbols and connections >
Display connections. The corresponding dialog opens.
Enter the first characters in the Enter text to filter field to reduce the amount of connection types displayed.
Move the mouse cursor over the connection types where the Show connection in menu icon is displayed.
Click Show connection in menu to remove the connection type from the list.
Click Apply.
The connections are no longer displayed in the matrix model. These settings are saved when you close the matrix model. When it is opened again, these settings are active. You can show these connections again.