PBase

Eg H1 = font family serif, but everything else is sans.

Q2: Can the H1 size be altered from default? It only appears as the gallery name, right?

Sorry but I'm not that clued up in HTML. Any help appreciated.

I'm not sure if H1 is used at all in the PBase user galleries - the gallery name that appears near the top of gallery pages is H2.

You can use different font families within a style sheet. For example adding

h2
{
font-family : sans-serif
}

to your stylesheet will results in sans-serif being used for anything enclosed in H2 tags, and will have no effect on any other fonts.