I want "weatherman"-functionality in my video-presentations, i.e., I'm in front of slide in say lower right corner (size e.g. 5cm x 5cm). Hence, I don't want text to run into that area where my body/head is going to be. Of course, I could cut lines manually, but it would be super-cool to have a template where the lower right corner of every slide, say size 5cm x 5cm (a quite big chunch of a Beamer-slide), is not "writeable" for text or lists and text is broken automatically. Is this doable?
EDIT: Just changing margins is not what I look for. But in order to speak to «margins», what I want to acheive is small left and right margins for top part of slide (wide textwidth), but a very large right margin in the lower part of the slide (same left margin). The wide right margin in lower part would give room for the «weatherman», while the narrow right margin in top part would allow text flow «over» the «weatherman».