Using Different Font Sizes
\Huge\text{I Want A Huge Heading}\newline\LARGE\text{I Want A Large Subheading}\newline\large\text{Written By: Red Gregory}\newline\normalsize\text{June 7th, 2020}
By the way, you can technically use inline KaTeX inside the heading of a notion page, but beware, the entire syntax will appear as the page's name.
Capitalize the first letter of a paragraph
\Huge\text{L}
\Huge\Bbb{T}
Experiment With Different Colors
\colorbox{yellow}{autem etiam actio quaedam}
\colorbox{lightgreen}{Metrodori liberos commendas?}
\color{blue}\text{ultimum cum ultimo sapientiae comparatur.}
\colorbox{dodgerblue}{autem etiam actio quaedam}
\colorbox{crimson}{Metrodori liberos commendas?}
\color{yellow}\text{ultimum cum ultimo sapientiae comparatur.}
Implement Borders
\fcolorbox{red}{pink}{Sed fac ista esse non inportuna}
\fbox{Qui non moveatur et offensione turpitudinis et comprobatione honestatis?}