There are these types of fonts in latex:
\tiny
\scriptsize
\footnotesize
\small
\normalsize
\large
\Large
\LARGE
\huge
\Huge
Generally speaking, the default font size is \normalsize. We can redefine the default font size at the beginning:
\documnetclass[12pt]{article}
Just change the value of 12pt. Latex provides three sizes: 10 / 11 / 12pt
Or directly define the text size:
\fontsize{5.0pt}{\baselineskip}\selectfont text
Change 0.5 to the number you want.
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\centerline
Syntax: \centerline{text}
This is the original TeX command for centering short text.
center environment
Syntax
\begin{center}
First line \\\
second line \\\
\end{center}
The center environment allows multiple rows to be centered.
In the center environment, if the "first line" is too long, it will automatically wrap, and the text of the wrap is still centered, so this is a very common way to do it.
1. Use the defined color directly
\usepackage{color}
\textcolor{red/blue/green/black/white/cyan/magenta/yellow}{text}
where textcolor{…} contains the system-defined colors
2. Combine the values of red, green and blue to form the color we want
\usepackage{color}
\textcolor[rgb]{r,g,b}{text}
where {r,g,b} represents the combination of red, green and blue colors, and takes values in the range [0-1]
\textcolor[RGB]{R,G,B}{text}
where {R,G,B} represents the combination of red, green and blue colors, and the range of values is [0-255]
3. Define a color, call directly
\usepackage{color}
\definecolor{ColorName}{rgb}{r,g,b} This time r/g/b is defined in the range [0-1].
\definecolor{ColorName}{RGB}{R,G,B}, when the domain of R/G/B is defined in [0-255].
Here the name ColorName is defined for the color, and the following can call this color scheme directly
\textcolor{ColorName}{text}
Show upright text: \textup{text}
italic: \textit{text}
slanted italic: \textsl{text}
Display lowercase uppercase text: \textsc{text}
Medium weight: \textmd{text}
Bold command: \textbf{text}
Default value: \textnormal{text}
Italic: \textit{italic}, or \emph{italic}
Fine font: \textlf{light font}
Use equal-width fonts: \texttt{code}
Use sans-serif font: \textsf{sans-serif}
All letters uppercase: \uppercase{CAPITALS}
All letters uppercase, but lowercase letters are smaller: \textsc{Small Capitals}