compound state

[FAT-NTFS]

Hi all,
how I can design compound state? there is only simple state in toolbox of Enterprise Architect. should I design it manually(by place several simple state in one simple state)?  

[ngong]

I do it this way: right-click the state that shall become a compound state, select Advanced, select Define Concurrent Substates, enter a name for each region.

Would like to know, whether this is the recommended way of doing.