how can I manage the distance between text and table? I would like to have fixed space distance, say for instance 20 mm.
I hope that you can help me.
Many thanks. Greetings!

tabular
or a table
environment, below a caption, and what packages are used (caption
package used or not) - perhaps show some code, such as a Code: Select all
\documentclass[11pt,a4paper,draft]{article}
\usepackage{tabularx}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}}
\usepackage{colortbl}
\usepackage{amsmath}
\usepackage{tikz,pgfplots}
\let\amsboldsymbol\boldsymbol
\usepackage{bm}% changes \boldsymbol
\let\boldsymbol\amsboldsymbol
\usepackage{tikz}
\usetikzlibrary{quotes,shapes,positioning,matrix}
\usepackage{threeparttable}
\usepackage{verbatim}
\usepackage[nottoc]{tocbibind}
\usepackage{enumitem}
\usepackage{array}
\usepackage{booktabs}
\usepackage{rotating}
\usepackage{longtable}
\usepackage{float}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{lmodern}
\usepackage[english]{babel}
\usepackage{natbib}
\usepackage[arrow, curve, matrix]{xy}
\bibliographystyle{agsm}
\usepackage{setspace}
\setstretch{1.5}
\usepackage[left= 4cm, right = 2cm, bottom = 2cm]{geometry}
\usepackage{hyperref}
\usepackage[printonlyused]{acronym}
\usepackage[hang]{footmisc}
\renewcommand{\arraystretch}{1.5}
\begin{document}
\begin{center}
\begin{spacing}{1.0}
\begin{longtable}{p{2.3cm}p{0.5cm}p{10.9cm}lcr}
$X$ & = & fiv \\
$Y$ & = & re \\
$Z$ & = & en \\
$\lambda$ & = & fi \\
$\beta$ & = & tota\\
$AL$ & = & pre \\
$QDA$ & = & changes \\
$APPA$ & = & all \\
$TETA$ & = & idio \\
\end{longtable}
\end{spacing}
\end{center}
\end{document}
\setlength{\LTpost}{10pt}
align
environment, though. This would fit to relation sign spacing in equations.