Hi ive created my own custom ui and like it alot sofar only thing ive had problems with along the way is binding my subtool 1 too a area. I have no problems binding subtool 2 and 3 too a are but number one always has a mesh in it soo when i drag it too a area where i whant it save my ui layout and restarts zbrush the subtool 1 menu doesent stay put as subtool menu number 2 and 3 does. Thx on forehand guys love this community!
SubTool and 3D Layer lists will not work in custom UI arrangements. See here for a couple of other points:
UI-problem-Please-Help-Answered