> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-tw/zhi-shi-ku/122-preamble-organization.md).

# 前言組織

## 簡介

## 通用概念

基本想法是以較細緻的方式組織導言區：從最一般的套件和設定開始，接著依序安排必要的套件和設定到較專案特定的項目，最後是使用者巨集。這有三個主要原因：

1. 這對相依性也適用；一般而言，使用者巨集會依賴已載入的套件。數學以及其他套件也可能依賴已載入的字型。
2. 最常變動的項目放在最後，也就是最接近文件主體的地方。
3. 這有助於讓導言區保持良好組織，並讓事物更容易找到與調整。

不過，這也有例外，因為有些套件的載入順序確實很重要，請參見 [#套件載入順序的例外](#package-loading-order-exceptions) 以查看清單。

## 一些範例

## 將導言區放入獨立檔案

可以將導言區放入獨立檔案。有三種基本方式：

* 將導言區移到一個標準 `.tex` 並使用 `\input{...}`.
* 將所有內容放入使用者套件並使用 `\usepackage{...}`.
* 將所有內容放入使用者類別並使用 `\documentclass{...}`.

無論哪種方式，最好始終保留 `\documentclass{...}` 在主檔案中，並將主檔案保留在專案的頂層資料夾中。

## 套件載入順序的例外

對某些套件而言，載入順序很重要；因此它們不能遵循前面提供的通用概念。


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