LaTeX.org

Thank you again. OK, so this is the original code:

\documentclass[a4paper,11pt]{book}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{hyperref}
\usepackage{graphicx}
\usepackage{ragged2e}
\usepackage{blindtext}
\usepackage{dirtytalk}
\usepackage{csquotes ...

THANK YOU!
Now how do I put the text that follow back to normal? Before, it was full justified, double-spaced, and a bigger font. Now it's fully centered, single-spaced, and note-sized font. Here is the original prematter (is that right? I can't remember.) for you ...

To anybody that answers me plea for help:

As the subject line says, I just started using LaTeX the past few weeks. I am trying to create tables, but cannot. I have looked everywhere I can think on the internet to try to find answers, and some of them are close, but none are perfect.
So it looks ...