Procedure: To Trace into a Function or Subroutine
With the insertion point on a line of source code to execute, press the F7 key.
If the current line calls a function or subroutine, the debugger will trace into it and execution will step through it. As you step through the function or subroutine, you can choose to step over or trace into any call to other routines. When execution has stepped through the called function or subroutine, you return to the next line of the calling routine.