Mising a x-hight line

#1

I’m missing very much a line for the x-Heiht!

#2

Hello Jens

there is also an auxiliary line for x-height in Fontself.

see https://help.fontself.com/en/articles/900365-set-font-metrics-with-illustrator-guides

or have a look at my German book http://www.computergrafik-know-how.de/fd1