Axes Location problem (Optical Size)

Glyphs
1

Hi, I try to create a variable font using the optical size variable but when I try it doesn’t work.
I insert the Optical Size Axes in: Font info > Font and in: Font info > Master I use the custom parameter to insert the optical size value.

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2

You Glyphs is very old. You should update to the latest version. Any reason you didn’t do that yet?

3

Yes, it is probably the problem. I’ll do that right now.