When I reopen a spreadsheet sometimes it comes up with giant white rectangle shapes anchored in the top left corner. I tried deleting them but there seems to be an infinite number of them underneath. I have no idea if I’ve pressed something or what.
What do I do? :’(
I just saved a sheet in .xlsx format which I did in LibreCalc. There were no shapes on it when I saved it. Reopened it on another computer with Excel and the rectangles popped up. Clearly there is a ghost in the machine laughing at my pain.