Excel for Mac: Chart Select Data Source - Permit edit mode
This comment is for Excel for Mac for Office365.
When editing a cart data series (right click the data series in a chart and select "Select Data ..."), there is no way to toggle between edit mode and select mode when editing the data series fields (say, "X values" in a scatter chart).
In normal Mac formula editing, F2 does this toggle. I understand from support that F2 toggles this on the Windows version of Excel
Please add this consistent functionality to the Mac.