Dialog Box: Molekel Files [File Menu]
This option is available only the File menu of the Atoms window. It will write a file in the native (.mkl) format for the (free) molecular graphics program Molekel (www.cscs.ch/molekel). Among other things, this program will animate the vibrational motion.
It will also write raster files of the animation, although they are not collected into a "movie". Among the raster formats available for the Windows version, TIFF packbits seems to be the only one with compression (avoid JPEG because it is not lossless).
The Scale: factor shown in the Dialog Bar on the left is applied to the atomic motions given in the Output Window.