A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Thanks for the reply, I check the Conditional Formatting and there doesn't seem to be anything. I dd manage to narrow it down to the fact that it seems to be using Automatic for the background pattern colour. It seems that it's only applying this pattern when I'm editing the cell and by changing that pattern colour to white I can fix it on a cell by cell basis but this isn't a suitable fix for the whole sheet because there's hundreds of them and they create new ones each month. Where does Excel get the colour for "Automatic"? I checked to see if there was a macro setting the colour but there isn't.