I have a spreadsheet with hidden columns, say, columns B and C. When I write a formula is column D that points to column A, Excel will automatically unhide columns B and C while I'm writing the formula. How do I keep columns hidden while writing formulas? This has never been an issue before, and I can't seem to replicate it on other machines. It just started happending on my machine recently. I'm sure it's some setting I've turned on or off but can't figure it out. Anyone know?