I'm using \usetheme{Warsaw} and want to set smaller space between frametitle and content (text, pics, formulas). As I know, I could change it by some kind of this command: %\addtobeamertemplate{frametitle}{something}{\vspace*{Xcm}} But honestly, I don't understand it. Maybe I could change \vspace{Y} line in beamerthemeWarsaw.sty, but I coldn't find this file. I only found reference to it in a /var/lib/texmf/ls-R-TEXLIVEDIST file. Thanks in advance. P.S. I could use \vspace{-Zcm} in every frame, but I think it is not a good way.
In my distribution the beamerthemeWarsaw.sty file is located at /usr/share/texmf/tex/latex/beamer/base/themes/theme/. But I think you should be looking at the style files in the directory /usr/share/texmf/tex/latex/beamer/base/. The file you want is perhaps beamerbaseframecomponents.sty. This has the dimensions of margins, etc.
However, I am sure you have noticed that as you fill up a slide with content, the space between the frametitle and content keeps decreasing. So, if you need to reduce this space in only some of the slides, \vspace might be an easier option.
Hope this helps.