Controlling program execution Information on using the debugger. Start the DebuggerTo launch the Debugger right-click on a program node and select Debug.Start the Debugger on a running programYou can debug a running program.Stop the DebuggerWhat happens when you stop a debug session depends on how the debug session was started.Step through the programThe step command allows you to "step" through your program executing one line of source code at a time. When a function call appears within the line of code, that function is also stepped through. BreakpointsA breakpoint is a signal that tells the debugger to pause the program. A breakpoint displays as a red dot beside the corresponding code line.WatchpointsA watchpoint is a signal that tells the debugger to pause the program when the value of an expression changes. Debugger (fgldb) command promptThe Graphical Debugger also provides a command line interface. Once you have started a debug session, you can enter fgldb commands directly into the fgldb Command view.