The first item, Help, in this menu opens the Help window. (You can also open the Help window by using Help for MuEdit from the Apple menu.) The Help item is checked (‚àö) when the Help window is open. Even when this item is checked, the Help window may be covered by other windows. Select Help again to bring it to the front.
The remaining items in this menu comprise an alphabetical list of all the windows opened by MuEdit. Select any window to bring it to the front. The windows whose contents have been altered since the last save are marked with a diamond (◊) when the system script is Roman. In other scripts, the mark may have a different appearence.
The number of windows that can be opened simultaneously depends on the amount of memory available to MuEdit. You can change the memory size setting by invoking the Finder's Get Info (Cmd-I) command.