false neutral between 1st and 2nd

[Major Rant]

do you mean adjust the linkage/selector shaft (with the dot on) or the height or the gear lever relative to foot peg?

I mean the height of the gear lever relative to the footpeg. Involves shortening (or legnthening) the bar that joins the lever to the selector shaft.
Now that I think about it, you need to undo both locknuts (one of which is Left Handed) and then rotate the 'core' to change the bar length.