Hi everybody, I'm trying to insert a \twocolumn text inside my article.
The problem is that the part starting with the twocolumn command and ending with the onecolumn command is inserted in a new page, but I would like everything to be inserted on a single page.
Below is my code
\documentclass[a4paper, 12pt, italian]{article}
\usepackage{amsmath}
\usepackage{listings}
\usepackage{xcolor}
\usepackage{graphicx}
\usepackage{geometry}
\usepackage{tcolorbox}
\geometry{legalpaper, margin=1in}
\newcommand{\red}{\textcolor{rosso}}