Creating sequence diagrams in Enterprise Architect

A few screenshots describing how to create sequence diagrams using Enterprise Architect. There is an excellent YouTube presentation, which is where I got a lot of this information from, available from here:

In your project browser first click on the new diagram icon:

Then select ‘UML Behavioral’ from the type column and ‘Sequence’ from the Diagram Type column:

Drag an actor on to the drawing area:

And then a lifeline:

To draw an arrow between the actor an lifeline, select the actor, so that an upwards-facing arrow becomes visible beside it:

Click on this arrow, dragging it over to the lifeline:

To add another lifeline, do the same as before by selecting it from the toolbox and dragging it over to the target destination. Ditto adding a new link between the first and second lifeline objects.

To lower the second object, double click on the arrow between them,
select lifecycle -> New and give it a massage and press OK:

And notice that the second item drops down lower, and the line between becomes dashed:

Feel free to now to draw a few more interactions in exactly the same was as described above: select the source object and its arrow, and drag to the target object:

To insert a gaps between message exchanges, I right click on the lower link in this example and select Activations -> Start new message group:

Which results in the desired gap:

To show self-activity, click on the item’s arrow and drag it back on to the same lifeline. Double click on it in order to set its message:

For me that’s all I really need to know about this for now, but I will update if I come across any other issues that need documenting.

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  1. shalu 28 August 2016

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