[WriteLog] Puzzled???

[DickT-W0RAA]

I am puzzled by a small little red diamond in my Writelog MMTTY window.  It 
is
on the right side of my area just above the waterfall.  If I click on it, my 
Mark
changes and my entire receiver passband area shifts to the left side of the 
waterfall
area.  I've never seen this before or had it happen before.  Can somebody 
tell me
what it is, or how it got there, or how to get rid of it?

TIA,

Dick
W0RAA