[GridLok]

Thanks JKT; that's where the new template is - in ~/Library/Application Support/OmniOutliner 3/Templates. But it doesn't appear as an option in the drop down when File>New From Template is 'hovered' over. There are 2 files in the aforementioned folder, one labelled 'Default' - my originally modified default, that opens if I just click File>New; the other, the recently created, special purpose template. The first (the default template), appears as an option the second does not.