Thanks, I have now tried it. It makes everything larger even inside the StylePicker so it will be of some help for me.

But it reduces what is visible on the screen as a whole and also the fonts used in the StylePicker does not seem be scalable. Some magnification levels make the text look very bad.

I am more looking to find out if there is a way to selectively change the fonts used in the StylePicker meny of BB. If there is a configuration option or some definition file or some hack, patch or other modification to BB that people are using for this.