I created a template and saved it in Numbers in the My Template folder. I subsequently decided to abbreviate the column headings which are the months of the year, but when, for example, I select the heading ‘January’ and change it to ‘Jan’ it reverts to ‘January’ when I press Enter. It appears that I cannot modify a template I create and save, as we can one of the templates that come with Numbers, is this so? Or, have I missed something.
I wanted to make the change to simple three letter headings simply because I thought it was neater. But was surprised to find I was unable to make what I thought would be as simple as adjusting the text in the ‘built in’ templates.
Device: Mac Running Big Sur