Count vlookup columns

This is really strange, but I can suddenly see it again at the top of my screen!  (See screenshot).  This is different than the screenshot I posted yesterday.

I'm not sure whether it was appearing at the bottom of my screen yesterday as you suggested, perhaps it was and I just missed it.  As far as I know though, I don't think I did anything differently to move it back to the top today.  Maybe there was a software update overnight or something.  Nevertheless, thank you Haytham and Ingeborg for your replies!

Hello,

I can see the column number as you show, but I have another problem may be you could help me.

after using office 365, in the vlookup function, I could not go to the end of the selected columns by shortcut function. before I used control+spacebar, now it would not work.  I tried to use other suggestions googled online, but nothing works.

Thanks in advance for any suggestion.

I have the same case here. The only situation where it works is when the reference is inside the same workbook. The column count reference doesn't work when the formula is in one place and the reference in the other. 

Anyone has any idea on how to enable this column count?

It looks like a "new instance" issue... some other errors used to happen with vlookup formula when working on different instances...the difference now is that the error occurs even in the same instance.

I'm using Microsoft Office 365 ProPlus, version 1711 (Build 8730.2127).

I'm able to see the tooltip in the second image you posted, but not the first.  Below is a screenshot of what I see when I try to highlight the columns.  There is no tooltip at all.