(TRON name name ...)
TRON turns on tracing for the selected names. If tracing is enabled for a prticular name, all calls to a procedure with that name are displayed in the trace window. If the name is a built-in command, only its input and output are displayed. If the name is a user-defined procedure, each step of the procedure is displayed. Furthermore, all assignments of a value to the name is displayed in the Names window, and all properties are displayed in the Properties window.
If TRON is used without any inputs, tracing is enabled for every Logo name including built-in names nd user-defined names.
Use TROFF to disable tracing for any name.
Use the menu commands Debug/Procedures..., Debug/Names... and Debug/Properties... to selectively enable tracing.
? TRON "CIRCLE