Dragging and dropping rollouts sets Rollup order. The order of the rollups will be saved in the file RollupOrder.cfg (in ASCII), which is located in the UI directory. Deleting this file, or removing an entry for a specific Class, will reset the Rollout order.
cmdPanel.GetRollupThreshold()
cmdPanel.SetRollupThreshold()Determines how many pixels of a rollout should be scrollable in the command panel before the rollout is shifted into a separate command panel column. This option is only applicable when there are multiple columns displayed in the command panel.
Rollups, which can be customized have a new RCMenu entry, that lets the user reset the rollup customization. In order to delete all rollup customization the user can simply delete the RollupOrder.cfg file in the UI directory and restart MAX.