Overshoot cut off on export

I created a variable font recently, when I’m testing it in Libreoffice I noticed the overshoot in the uppercase O is cut off at the top.

Is there some export setting I need to make sure to avoid this?

This is about the ascender height, beyond which the font rendering may be cut off (not alignment zone). It’s also advised that the ascender height is higher than the cap height, not the same. In this case, maybe try 810 to cover the overshoot.

And it’s safer to set ascender height’s alignment zone size to 0 (alignment zones should not overlap).

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If the ascenders are really the same hight in your design, keep the metrics as is. But you might need to add some custom parameters to control line spacing and clipping. Have a look at this: Vertical Metrics | Glyphs

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