Other settings for “non-scientific” texts in LaTeX

Figures that have no numbers, but only text in the captions:

\usepackage{caption}
\captionsetup[figure]{labelformat=empty,textfont=footnotesize}
\renewcommand{\thefigure}{}

No indentation at the beginning of a paragraph, but a bigger separation space between paragraphs:

\setlength\parindent{0pt}
\addtolength\parskip{4pt}

Header lines that contain only page number and chapter, not the section:

\usepackage{scrlayer-scrpage}
\clearpairofpagestyles
\automark[chapter]{chapter}
\ihead{\headmark}
\ohead{\pagemark}