How to set default value in variable typeface

Hi, I am creating a variable typeface with 3 axes all of which range from 0 (the lowest value) to 96 (the highest). In my mind, the perfect value optically is 64 but users have the discretion to slide the value left and right.
Currently, the default value is 0. I wonder if there is a way to change that to 64.

Thanks,

There’s a custom parameter, Variable Font Origin. You can read more about it here: Creating a variable font | Glyphs

Bear in mind that the default location in a variable font needs to correspond to a master in your design space. If not already present, you would need to add an extra master at that specific location.

Then, don’t forget that (usually) extra masters on in-between locations require you to add masters on all other axes for this location in order to achieve a rectangular design space (not sure this is clear, so in mathematical terms: you need a master at every coordinate in a Cartesian product of all existing coordinates).

Got it. Thanks a lot!!!