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Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.

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Communication Message Colors

Communication diagrams illustrate how components interact and exchange information in a process. They have a large number of messages that indicate the timing or sequence of events in the communication process. You can define the sequence of these messages using sequence numbers, which also help you to group messages within a stage in the sequence. To help make the sequence easier to see at a glance, you can also:

  • Select to display the messages in color
  • Set a color for each group of messages



Start > View > Preferences > Communication Colors

Keyboard Shortcuts

Ctrl+F9 | Communication Colors


  • Select the 'Use Communication Message Coloring' checkbox to turn on message coloring in the Communication diagrams you open; when you select this option, Communication messages display in different colors depending on the sequence group they belong to on the diagram - for example, messages 1.n are black, 2.n are red and 3.n are green
  • Click on the down arrow in the color field for each numerical message group and click on the color to set for that group; if you have more than eight groups in the sequence the color pattern repeats, so group 9 messages are the same color as group 1 messages, and group 10 messages are the same color as group 2 messages
  • Click on the Close button to save the changes you have made, and to close the 'Preferences' dialog

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