Latex Adjust line spacing

Ways to modify Line spacing:
\usepackage{setspace}% using the Spacing macro package
\begin{document}
\begin{spacing}{2.0}%% line spacing becomes double-space
Double-spaced paragraph content.
\end{spacing}
\begin{spacing}{1.0}%% line spacing becomes single-space
Single-spaced paragraph content.
\end{spacing}
\end{document}
Ways to add empty rows:

In latex documents, branches are done automatically, and in general there is no need to use the branch command. Use the command \ \ To start another line. Use the ENTER key directly to knock out a blank line, and you can start a new paragraph.

If you want to be in the distance between the last paragraph and the next paragraph, you can use the command \vspace{...}, where you can use a unit of measurement such as cm,in,mm,pt, such as \vspace{12 PT}. Unit EX is recommended because ex represents the height of the lowercase e in the current font, which is a variable-length unit that varies with the size of the article font settings.

\vspace{...} The command can only use cases where there is a paragraph in front and back, otherwise it will be an error (as is the \vskip command). If you want to empty a row at the beginning of a page , you can use the command \vspace*{...}, such as \vspace*{3 ex}.

Latex Adjust line spacing