The fonts on the interface are too small, how can I make them bigger? I just downloaded Blender to my Surface Pro 4 tablet, but I cannot read the menu bars, the fonts are too small. How can I make the menu fonts bigger?
Open Blender's User preferences by going to File > User Preferences or pressing Ctrl + Alt + U and under the System tab the first option under General > DPI should do what you want.

Just increase the DPI to the desired value or to match your display