Hi Saurabh and ferret users,This is off topic, but maybe useful to some people.4) please make sure that for making animation from gif files you should have installed a software gifsicle. from a simple command in the linux promptsudo apt-get install gifsiclea) For Mac users, assuming they use homebrew,brew install gifsicle --with-x11"--with-x11" is necessary to get gifview (see below).b) Imagemagick can be used, too: For a simple GIF animationconvert -delay 100 ???.gif animation.gifI haven't tried but other formats may be possible. Then there is the mighty ffmpeg.c) "gifview" included in the gifsicle package is a wonderful animated-GIF viewer, especially for research purposes. The animated GIF file can be viewed as a slide show. You can stop the animation; you press a key and the next frame is displayed; you press another key and the previous frame is displayed. In this way, not only animation in t (time) but also "animation" in x, y, or z can be useful. There are other means to view a set of images as a slide show, but true animation isn't possible in that case. Animted GIF can be both under gifview (because animated GIF is sort of a fast slide show).Regards,Ryo