This parameter determines which master is used to build the plain glyf table. There needs to be another parameter to set the defaults positions of the sliders.
@GeorgSeifert Any news on that? I would much appreciate the possibility to specify an instance as the variable origin, instead of a master. Same reason like @Marc_Foley mentioned above. Often we have only the extremes as master and would like to specify eg. the middle instance (Regular) as the default outlines.
Just saying: an Adobe bug forces us to use the first master (min value on all axes) as the origin. If you set as origin anything else, you get a weird Regular on top of everything. In this case I don’t even have any “Regular” instances, thanks Adobe for adding one for me.