You can quickly view process and thread state in both the Root Window and the Process Window. (You can also view the state of all processes and threads in a parallel job using the "The Parallel Backtrace View".)

The Root Window contains an overview of all processes and threads being debugged, along with their process state (i.e. stopped, running, at breakpoint, etc.). You can dive on a process or a thread listed in the Root Window to quickly see detailed information.