To Create Custom Menus in Zbrush:
- Preferences/Config/Enable Customize
- Preferences/Custom UI/Create New Menu
- Name it
- It will appear along the top menus
- Drag it to the right most pane to edit it
- Ctrl + Drag Items into the New Menu
- To add a Sub Palette, drag it from Preferences/Custom UI/Custom Subpalette (Ctrl + Click SubPalette's name to rename, AFTER it has things in it)
- When Done, CLICK OFF "Enable Customize" Button
- Preferences/Config/Save UI
- Name and Save it.