Can't see the "+"/"-" symbol in grouped columns

[cool1_boy1]

I have Excel 2013.
When I group columns together, I don't see the "+" sign at the top to expand/collapse the grouping.

What's going on?

 

[Ron Coderre]

Since you're having atypical Excel behavior, I'm inclined to recommend closing and restarting Excel. If that doesn't work: reboot your computer.
Let us know your progress.

 

[cool1_boy1]

reboot your computer.

I restarted my computer and I still have the same problem.

 

[cool1_boy1]

Grouping in other excel files works great. But for some reason, it doesn't work in this one file.

 

[RoryA]

Can you post a screenshot or the workbook itself somewhere?

I assume you were checking the Options we mentioned with that workbook/worksheet active?