[Elecraft] odd symbol

[Bruce McLaughlin]

Recently I noticed a new symbol has appeared on the LCD of my K-3. It is a plus symbol + which is at the bottom right-hand side of the LCD. I don't recall seeing it there before now. Does anyone know what it means? And how I could remove it? It does not seem to have impacted the operation of the K-3 but since it is not something I have seen before I think I would rather see it disappear. I have looked through the owners manual but I can't seem to find any reference to it other than the page which shows all of the symbols that might appear on the LCD and it does appear to be in the lower right-hand corner. Unfortunately, I can't seem to find an explanation for it

 Bruce - W8FU