When you first create a process model using Process Studio, a Quick Guide will appear. The guide helps you through the basics of the modelers functions and settings.

You can choose the option, Don't show this again if you don't want it to open every time you open the modeler.

If you would like to view the Quick Guide again, use the question mark in the upper right corner of the modeler to open the quick guide again.

The Quick Guide

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Or check out the other articles in the category Using the modeling tool - BPMN 2.0