[Elecraft] small arrow on P3

[DOUGLAS ZWIEBEL]

That tells you "in what direction" your other VFO is set to...and that is
is "off scale" for what you currently have displayed.

To prove it to yourself, push the A>B button so that both VFO's are on the
same frequency.  The arrow should "go away."  Now turn the knob on VFO B
until the marker goes off screen (either direction) and the arrow will
'show up' again.

:-)

de Doug KR2Q