Tiled images can have their color maps synchronized, etc.
Support for multiple frames requires that the frame size of each be the same. Frame size also can be specified with the IRAF .ximtoolrc file . Users of the old SAOimage program are used to having the frame size adjust itself as each new image is loaded. By default, this is turned on. When autoconfigure is turned on, the framesize will be reconfigured each time a new image is loaded.