The Utilities list in the MAXScript rollout contains scripted utilities that have been defined in startup scripts or while working in MAXScript. For details about defining scripted utilities, see Scripted Utility Panels.
As soon as you define a utility, MAXScript adds the utility's name to the Utilities list. When you select a utility from this list, its rollout is added to the Utilities panel after the MAXScript rollout. You can open as many utilities as you need, and close each one with its designated Close button.
If you modify and reexecute the script for an open utility rollout, that rollout is replaced immediately with the updated rollout. This lets you develop scripted utility rollouts incrementally with immediate, visual feedback.