I ntermediates Everything in the program is traced. The intermediate result of each expression is output along with the resolved value of each variable. The output is identified by special formatting codes . R esults Everything in the program is traced, but only the final result of each expression is output. Each clause is output to the console as it is executed, but the results are not shown.
C ommands Only command clauses are traced.
L abels Only labels are traced. This option shows when a script has jumped to a subroutine. E rrors Any command clause that generated an error is output with an extra line indicating the error number returned. S can This mode traces all clauses, and checks for errors, but doesn't actually execute any of them, making it useful for in initial check for syntax errors.