Is it possible to modify the scale on the return loss plot when the measurement is configured for Return Loss & DTF on a FieldFox instrument?

Per the Keysight N9912A FieldFox manual:

"All plot settings, such as Scale, Markers, and so forth, are made to the DTF (bottom) plot, NOT to the Return Loss (top) plot"

There is no method to change the scale on the upper Return Loss (top) plot.

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