如何仅编辑页面的颜色
\documentclass{report} \usepackage[dvipsnames]{xcolor} \usepackage[margin=1in]{geometry} \usepackage{afterpage} \usepackage{tikz} \usetikzlibrary{fadings} \usepackage{geometry,tikz} \usetikzlibrary{calc} \usepackage[placement=bottom,scale=1,opacity=1]{background} \backgroundsetup{c...