[Latex entry] 06. Set the page core, page margin, header, and footer.

Set the page cores in the introduction area: \ setlength {\ textwidth} {page width} \ setlength {\ textheight} {page length} The following example shows how to set margins, headers, and footers, set the header, footer, and page margin.
You must set the header and footer in the document environment, but not in the Introduction area. The margins must be set in the Introduction area.
The red part sets the header and footer. The blue part sets the margins.

\ Documentclass [12pt, a4paper] {Article} \ usepackage {CJK} \ usepackage {lipsum} % macro package of randomly generated text \ usepackage {geometry} % set macro package \ usepackage {titlesec} % of margin macro package \ geometry {left = 3 cm, right = 2.5, Top = 2.5, bottom = 2.5} % set top, left, bottom, right margin \ begin {document} \ begin {CJK *} {GBK} {SONG} \ cjktilde \ cjkindent \ newpagestyle {main} {\ sethead {left header} {middle header} {right header} % set header \ setfoot {left footer} {middle footer} {right footer} % set footer, you can add \ thepage to the footer to display the page number. \ Headrule % Add a header underline \ footrule % Add a footer underline} \ pagestyle {main} % use this style \ lipsum [1] \ clearpage \ end {CJK *} \ end {document}