MAKE "TRACE.LEVEL integer from 1 to 3
The value of TRACE.LEVEL controls the level of detail at which TRACE operates. There are three TRACE levels. Level 1 lists entry and exit from user functions. Level 2 lists entry and exit from user and system functions other than arithmetic and relational comparisons. Level 3 lists all evaluation calls, user and system functions including arithmetic and relational comparisons.
See also SINGLE.STEP.