Currently everything on my laptop takes up too much screen real estate. I can make the launcher icons smaller, the font smaller, I can use ctl-(minus) to make the contents of my browser smaller, but I was wondering if there was a way to do this all at once. Some way to just tell X to multiply the number of pixels anything should take by .75.

If this is not possible, the main other thing I want to make smaller and have not been able to, is the top bar of any windows, the one with close/minimize/maximize buttons.