LaTeX.org

Now its working. Thank you very much. But what sort of argument does "\textbf" require? It must be something new for I didn't find it in any manual or course and I checked a few of them.

Well, here's the code (after replacing {minimal} with {book}):
\documentclass[12pt, a4paper]{book}
\usepackage[landscape]{geometry}
\usepackage{fullpage}
\usepackage{polski}
\usepackage[utf8]{inputenc}
\usepackage[polish]{babel}

\begin{document}
\vspace*{\fill}
\center \textbf \huge 1
\vspace ...

Hello everybody, I'm new here.

And for the beginning I've got a problem. First of all it doesn't recognize commands changing font size (e.g. \large , \small and so on). When I define document class as "minimal", an error of undefined control sequence occurs, otherwise the code is compiled properly ...