.COMPILE - Compile a program.
.CONTINUE - Continues execution of a stopped program.
.EDIT - Opens a file in the IDL Workbench editor.
.FULL_RESET_SESSION - Reset the session and unload sharable libraries.
.GO - Execute a previously-compiled $MAIN$ program.
.OUT - Continues execution until the current routine returns.
.RESET_SESSION - Reset the IDL state, delete all variables and clear compiled code.
.RETURN - Continue execution until RETURN statement.
.RNEW - Erases $MAIN$ program variables and then execute .RUN.
.RUN - Compile and execute IDL commands from a file or the keyboard.
.SKIP - Skip over the next statement or statements.
.STEP - Executes one or more statements.
.STEPOVER - Executes one or more statements but do not step into routines.
.TRACE - Continue execution, display each line of code as it is executed.