Numbers: Create Custom Format is greyed out
Hi
I am trying to apply a custom format in my spreadsheet but the function is greyed out. This is happening on every tab and table.
I copied a cell from another spreadsheet with a custom format and i now have a specific custom format but still the create function is unavailable.
I have opened a new spreadsheet and the function is available.
Is there a setting that needs to be turned on?
Many thanks for your help in advance.
Alan
MacBook Pro 13", 10.14