Strange gridlines have suddenly appeared

[philguk]

Suddenly, for no apparent reason, my FR24 display now has weird grid lines on it - almost as if they were map grids, but they don't appear to be regularly spaced (see attached)

They do NOT appear on my wifes pc - only on mine

I'm Win 7 using Chrome - if I use IE, I don't see the grid lines

It's as if I have selected an option which I can't now figure out how to turn off!

Help please

Phil G

[philguk]

Well, what do you know - I just solved my own problem

It seems when you ZOOM in Chrome (CTRL-+) the gridlines appear - when you reset the zoom (CTRL-0) they disappear

Sorry to waste everyones time

Phil G