Opens the Configure Modifier Sets dialog to let you create a new, custom button set.
When on, buttons for the current modifier set are displayed between the Modifier List and the stack display. Default=off.
When on, the Modifier List is organized by sets. When off, the Modifier List is organized simply into World-Space Modifiers and Object-Space Modifiers, and is otherwise alphabetical except that the current set appears at the top of the list. Default=off.
The bottom part of the Modifier Sets menu lists the names of saved modifier sets. Choose one of these sets to make it the current set, which is displayed as buttons when Show Buttons is on.