· Vikram Aruchamy · LaTeX
How to Change the Font in LaTeX (Family, Size and Custom Fonts)
To change the font of a whole LaTeX document, load a font package in the preamble, for example \usepackage{newtxtext,newtxmath} for a Times-style font with pdfLaTeX. With XeLaTeX or LuaLaTeX, load fontspec and pick any installed font with \setmainfont. Change the base size with a class option such as 12pt, or locally with commands like \large.