Interpolate spacing font-wide

Is there a way to font-wide interpolate (or reinterpolate) spacing metrics for all glyphs at once in a middle master (e.g. Regular, from Thin and Black masters)?

I can do it one glyph at a time in the edit view. And there is the kerning interpolation script (Kernschmelze?).

Apologies if this is obvious and I’m just not thinking clearly. Thanks.

It should work when you select the glyphs in font mode and run ‘Interpolate Metrics’ from the context menu in the layer panel. It that doesn’t work, I’ll need to fix it.

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Yes, looks like it worked. Overlooked it being there in the main font mode window. Thanks.