Currently the "Insert" button is disabled in the legend title editor. This request is to make this consistent with the sheet title editor.
In my application, my legend shows color codes for the forecast for the month for days after the 5th of the month, but the first 5 days of the month, it shows the actual income for the previous month. Consequently, I would like the legend title to change accordingly.
The current workaround is to have a very generic legend label, or use the "pop and swap" technique.