Good evening. First of all I want to thank to Mr. Hagen for his last answer. I will check your last code of balanced columnsets at home (with the newest ConTeXt). As for your correcting code for ordinary collumns, I have tried it with three different types of my documents, and it worked well. Maybe this is the final solution of the problem. I will try it with more documents and let you know, anyway. Now to my next question. I have seen a great thing: Metapost pictures were animated (probably with the JavaScript code). You can found some examples here: http://www.math.muni.cz/~plch/nkpm/nradanm6.pdf http://www.math.muni.cz/~plch/nkpm/nradanm8.pdf (Just click on the `Spustit animaci' button.) Is it possible to do it simply in the ConTeXt? Of course I may break down the mechanism of widgets and write my own JavaScript (I don't know how to do timing), but isn't there some special macro for animating series of figures? It would be great. If so, is Acrobat Reader fast enough to simulate this way the nice feature of MS PowerPoint---curves and shapes that are drawn by pieces, or that appear somewhere and then go to its final location? (This is quite instructive in economics, because you can easily notice which curve is drawn first, what second, and so on.) How can I do it? With many greetings and thanks Michal Kvasnicka