Reply To: How to increase stack size?
The ‘mod’ located on nexusmods that allows you to change the stacksize ‘multiplier’ of the various inventories is called “Fk Inventory Management”, was written by Tonelikco, and is found in the “User Interface” section of the mods.
(1) It was last updated in Aug, 2016, so I have no idea if it works with the Pathfinder NMS.
(2) It requires NMSE, to do the dll attachment, and that program does not work with the Pathfinder NMS.
The ‘mod’ did work with the Foundation NMS (as did the lastest available version of NMSE), but so far neither has been updated and it appears (from the comments) that nobody is working on either of these to get them to work with Pathfinder NMS.