Calculations/Internal Variables in Activity Diagrams (for Activity object)

[game]

Hello,

I saw in the EAExample the Activity Diagram, Multiple Orders. Now I noticed that the activity objects partly contain variables and calculations. Unfortunately, I can't find anywhere how to enter them there when I create my own diagram.

Under which menu item can I insert these instructions?
I marked them yellow in the picture.




Many greetings

[Eve]

In the properties window you should find a page called Action.

The highlighted sections are in the 'Effect' text area.