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I want to make sequence diagram by using UML diagram set in Dia. Can I modify or lengthen the rectangle of the lifeline? When I extend it, only the dashed line that extends.
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To rearrange a lifeline in a sequence diagram, you must first select it by clicking lifelines while pressing the Alt key or by using the Select Message Set/Reorder pop-up menu before dragging. When selecting items to rearrange, clicking while pressing the Alt key permits you to only select a single item.
A sequence diagram is made up of several of these lifeline notations that should be arranged horizontally across the top of the diagram. No two lifeline notations should overlap each other. They represent the different objects or parts that interact with each other in the system during the sequence.
Bookmark this question. Show activity on this post. What's a good workflow (usage procedure) for creating a UML Sequence diagram in Dia? Show activity on this post. From the UML Sheet of Special Objects (left toolbar, center palette, use drop-down to select "UML"), select the UML Object object, , and then place an object in your diagram.
Next, from the same UML Sheet, select the lifeline object, , and place it in your diagram. Then connect the lifeline's uppermost line handle to the UML Object placed in the last step.
The dashed line is the lifeline (see here for an explanation). What you want to do is extend the execution occurrence (the wide rectangle). To do this, right click on the occurrence and select "Add connection points".
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