how-make-menu-title-bar-bigger
In terminal
defaults write -g AppleDisplayScaleFactor 1.5
would increase the overall scaling of everything launched AFTER you executed that code to 150% (with 100% being normal size)
defaults write -g AppleDisplayScaleFactor 1
will return everything to default size.
i just tryed it...150% makes everything way to big...maybe try 1.1 (which would be 110%)