Btukfyl

How can I put the page number to the bottom and very middle of the page? I now have:

documentclass[11pt, a4paper, german]{article}

usepackage{color}

usepackage{amsmath, amsfonts, amsthm,}

usepackage[utf8]{inputenc}

usepackage[ngerman]{babel}

usepackage{mathrsfs}

usepackage{amsmath}

usepackage{mathtools}

usepackage{amssymb}

usepackage{pgfplots}

usepackage{graphicx} 

usepackage{array}

pagestyle{headings}



pgfplotsset{compat=1.16}

begin{document}

section{A}

end{document}

Use pagestyle{plain} instead of pagestyle{headings}. This will center the page number at the foot of the page but will not print any headings at the top of the page. If you want both headings and a centered page number use the fancyhdr package (> texdoc fancyhdr for the manual).

Well, at last it depends on the content of header and footer you want to use.

If you only want the current page number on the bottom of each page you can -- as already mentioned by @Peter-Wilson -- pagestyle{plain} instead of your used pagestyle{headings}.

If you want for example to have a line before the footer you can use style fancy and define the layout of header and footer by your own, for example with:

usepackage{fancyhdr} % <===============================================

pagestyle{fancy}

fancyhf{}

fancyfoot[C]{thepage} % <================================= page nummer

renewcommand{headrulewidth}{0pt} % <=================== no header rule

renewcommand{footrulewidth}{1pt} % <====================== footer rule

If you use maketitle and tableofcontents things changed and you get the first page displayed without the footline. To get rid of this you can add thispagestyle{fancy}.

There are other definitions of header and footer possible, please see the documentation of fancyhdr ...

Please see the following code (with maketitle and tableofcontents, important code changings marked with <======):

documentclass[11pt, a4paper, ngerman]{article} % <=====================



usepackage{color}

usepackage{amsmath, amsfonts, amsthm,}

usepackage[utf8]{inputenc}

usepackage[ngerman]{babel}

usepackage{mathrsfs}

usepackage{mathtools}

usepackage{amssymb}

usepackage{pgfplots}

usepackage{graphicx} 

usepackage{array}



usepackage{blindtext} % <========================= to create dummy text 



usepackage{fancyhdr} % <===============================================

pagestyle{fancy}

fancyhf{}

fancyfoot[C]{thepage} % <================================= page nummer

renewcommand{headrulewidth}{0pt} % <=================== no header rule

renewcommand{footrulewidth}{1pt} % <====================== footer rule



pgfplotsset{compat=1.16}

title{Title}

author{Author}





begin{document}



maketitle

thispagestyle{fancy} % <=============================================== 

tableofcontents

section{A}

blinddocument

end{document}

and the result:

Please see that I changed your used option class from german to ngerman. BTW: Do not call packages twice ...