First, Article and Book style defaults are LetterPaper, the paper size is 11 * 8.5 inches (about 27.7 * 21.59cm, and A4 is 29.7 * 21cm), so starting with / documentclass [a4paper] {article} if it is new The version of CCT can be used with / documentclass {cctart} because its default is the A4paper option. Second, TEX calculates / oddsidemargin (/ EVENSIDEMARGIN, the beginning has a Twosite option to take effect), and / topmargin starts calculation from the paper inner 1 inch (2.54cm), so the real text of the paper should be 2.54 / ODDSIDEMARGIN ( / EVENMARGIN, give an example, if you want to set the text from the paper edge distance to 1cm, set it as follows: (Suppose is a4paper) /odDsidemargin=-1.54cm /evensidemargin=-1.54cm% There is a Twoside option to take effect / textWidth = 19cm
As for the text height, the real text of the paper should be 2.54 / TopMargin / headheight (Height of the Heat) / Headsep (the header to the top of the text), so it is easy to use / TextHeight to adjust the text height.
