Bone list and Bone Scaling notes.
this has been adapted from the textools reference doc page of the same title, created by sel. this has not been fully updated for dawntrail, and some information IS missing or outdated. I will correct when I can.
As a note. this list is based off the old bone list. Dawntrail completely redid the entire face skeletons, but there is not a complete list of them yet, so they will be added later. do not use this list for facial bones. Furthermore this is a list of Vanilla bones. any extra bones added by a mod such as IVCS or skelomae will not be in this list, and cannot be manipulated or used unless said mod is installed and set up properly.
Bones with <a-e> are multiple bones in sequence, such as sebo (spine) bones. Bones with <l/r> are left and right bones such as leg bones. bones with <f/b/s> are Front, Back, and Side bones, such as skirts. any bone with _ex in it's name is an Extra bone, and will only exist when the associated skeleton metadata is loaded. this is most commonly seen on hair, but has been used on gear on extremely rare occasions.
Main Bones
Endwalker Face Bones
As a note, not every bone can be manipulated or scaled outside of gpose, (such as with Customize+ for normal gameplay). furthermore, many of the facial bones are kindedriver or "Helper" bones, and are either not meant to be touched on thier own, or are meant to provide small adjustments after moving the main bone. If you are not posing an old NPC head, you should only use the face bones listed here, and not the ones in the above chart.
An example of gpose only bones is eyeprm and irisprm bones. These bones will only ever work in gpose and in cutscenes, and trying to alter them in a non-gpose only setting such as customize+ will cause these bones to immediately revert when leaving gpose. Do not use these for scaling outside of screenshots. This is not fixable and is a game limitation. if you want to dialate or contract your pupils for out of gpose, you will need to look into eye mods