Math vs. text font change

[gromadan]

While the text font can be changed many times during the document using \fontfam, the same does not hold for math fonts (regardless of whether one uses \fontfam or \loadmath).

I am not sure, if this is a bug, or it is meant to work like this, but I find this behaviour strange. In particular, if one wants to do slides, that is, if you run \slides, then this command implicitly chooses \fontfam[heros] and hence if you want to choose another font for your slides, you must write something like

\fontfam[libertine]   %changes both text and math to libertine
\slides               %changes text to heros
\fontfam[libertine]   %changes text back to libertine

which I find a bit silly. (Or maybe I am missing something and I am using the macros wrong?)

[olsak]

You can use \noloadmath and \doloadmath as follows:

\noloadmath \slides
\doloadmath \fontfam[libertine]