I am unable to select a cell or a row in excel. I can double click into a cell to add text, and I can tab to the next cell, but there is no way to indicate where I am in the sheet as the cell does not highlight when I am working in it. I also cannot hover over the corner of a cell to get the + to copy down. This is consistent with any file I open. I'm sure this is just a setting but I can't find it. Any ideas?