You must click on the task you want to access the properties, and after that click on the right side border in camunda modeler, and the task properties will appear.
Or you can go to the menu above, and click on Toggle properties panel.
About the question “1. How can I access to “Task Properties” instead editing xml?”
I am trying to access “implementation” property of User Task user task using Camunda Modeler and not for a Service Task.
In Camunda Modeler I can only see the “implementation” property of User Task in xml after added in yiaoqiang.
About the question “2. How can I “Open Called Process” that is in another file instead go to the menu to open the file.”
What I am trying to do in Camunda Modeler is when I select the option “Open Called Process” in Call Activity, it will open another file with a sub flow.
You need to check the name that is defined in the “Called element” of your call activity, and then manually search for the BPMN file that has the same name in the id.
Unfortunately, in the modeler, there is no such “link” relationship between both files and to do so it is necessary to search for and open the file manually.