latex define font size code example
Example 1: latex text size
\Huge
\huge
\LARGE
\Large
\large
\normalsize
\small
\footnotesize
\scriptsize
\tiny
Example 2: latex font sizes
Change global font size:
\documentclass[12pt]{report}
\Huge
\huge
\LARGE
\Large
\large
\normalsize
\small
\footnotesize
\scriptsize
\tiny
Change global font size:
\documentclass[12pt]{report}