In a statechart model, you can have
Their graphical representation differ somewhat, thus editing them is also somewhat different.
You can place a top-level region anywhere on the canvas, and you can change its size at will. To change the location or the size of a region, use the graphical editor. Drag the region to move it elsewhere. Use a selected region’s handles to resize it.
Regions inside an orthogonal or composite state are confined by their enclosing state. They are sized automatically, depending on their contents, and they are arranged either vertically or horizontally.
You can toggle between vertical and horizontally representation of regions in an orthogonal state as follows:
You can change the name of a region in the statechart editor as well as in the properties view.
[Return]key to finish editing.