Is it possible to add vertical metric parameter for CJK virtual body guideline?

The virtual body is usually a full-width square, no problem with that.
But it seems to be borrowing Ascender and Descender as vertical metrics. As who often works on Chinese fonts with Latin letters, I have to temporarily modify Ascender and Descender to get a correct CJK virtual body guideline.
Is it possible to add a custom parameter to define the top and bottom of virtual body guideline? Or add the vertical metric info as value in “CJK Guide” parameter?


This is planned for the next version.

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That’s great! Appreciate it.