HP 8753E Programming And Command Reference Manual page 169

These 5 commands set the window for the transform (Option 010, time
domain):
1-162 HP-IB Programnu 'ng and Command Reference Guide
Maximum.
Minimum.
Normal.
Enters arbitrary window. Range: state
Turns the trace memory ON as the
window shape.
Enters new softkey labels into the
indicated softkey positions. Initial use
of these commands requires previous
commands
Range: 1 to 8.
and