[Elecraft] P3 A/B difference mode?

[Gene Sochor]

I may  be already missing something with all the new features and 
fixes in P3 firmware, and others may feel this suggestion is 
downright silly, but:

Is there a way (or can there be in the future) to show on screen the 
Marker B difference  in frequency from VFO A or Marker A,  both 
positive or negative, instead of the the actual frequency?

While I'm pretty good at math, certain simple subtraction, it would 
seem handy in a 'rare dx panic situation' not to have to figure out 
what "up 3.25" kHz is in a real frequency, but to simply move Marker 
B that amount after Zeroing it to Marker A, particularly when one 
cannot hear or make out other calling stations.  I swear I 
accidentally made that happen just once, but can't figure out how?

Any ideas? Be kind, it's not that important.

73, Gene N9SW