Textual Analysis Enhancements
Textual Analysis is a useful technique for identifying candidate objects from a textual representation of users’ problem. In previous versions, it is possible to extract candidate actors, classes, use cases, and work flows from problem statement. Starting from this version onwards, the Textual Analysis feature is improved such that more kinds of candidate objects can be extracted from the problem statement. They include BPMN objects such as Task and Sub-process.
Creating a Candidate Task
Highlight the word/phrase that you want to identify it as candidate Task.
Right-click on it and select
Add text as Task from the pop-up menu.
This creates a candidate task from the highlighted text.

From Candidate objects to BPD
After the candidate objects are all identified from the problem statement, you can create actual model from them, and reuse them on the diagram.
Creating Task Model from Candidate Task
Right-click on a candidate Task from the candidate class pane.
Select
Create Task Model from the popup menu.
By repeating this steps on other models, you will obtain several new models, which can be seen under the Model tree.

Form a Diagram from Model
A diagram can be formed simply by dragging a model from Model tree and dropping it onto the diagram.
Resource