A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi
You posted your question to the general release forum, but you are using an Insider build, so I posted your question to the Insider forum. Because you are using insider builds, you should always use the special Insider Forum. Be sure to include your version and build number in all posts (get this from the Excel menu and choose About Excel).
In this case, I know you are using an Insider Fast build because that's the way Excel displays some worksheets in the current build.
It's pretty cool, don't you think? You should save some screen shots so you can brag about how you saw this once in Excel when you had a pre-beta test version.
Obviously, this will be fixed before it gets to release stage.
Meanwhile, you can use Time Machine to restore the previous build of Excel. I suggest you choose Keep Both. If AutoUpdate comes along and decides to get rid of your restored build, just restore it again. Or you can set AutoUpdate to Manual until next week.