Good way to change portal fontsize from a link

[Niko H, módosítva 12 év-val korábban]

Hi,

I was wondering if there is an inbuilt way to change the fontsize globally on the portal from a link? I could do this with javascript by changing the used css, but if you know a better way to achieve this, it would be nice to know

So the goal is to get a same kind of behaviour from a link, that for example ctrl+"+" and ctrl+"-" results on firefox.