July 25, 2019
I started using Excel 365 and, for some reason, the group/ungroup icons (+/-) and structures are not on screen anymore for one specific workbook. On other files, they do show. I tried going on the option menu, under the advanced options and set for the icons to be visible, but they were already on. I also tried clearing the structure, but when I group it back again, the problem is still there. The file is attached. Can someone help me out?
July 16, 2010
It looks like the Cashflow sheet is corrupt, because if you insert a new worksheet you can apply the group buttons and they are visible, but in the Cashflow sheet you can only see a tiny marker above the column that is grouped.
I'd copy the data on the sheet to a new sheet. Note: If you copy the sheet itself, the bug comes with it.