> 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-cn/zhi-shi-ku/023-can-t-find-the-pdf-viewer.md).

# 找不到 PDF 查看器

如果你看不到包含 Overleaf 编辑器和 PDF 预览的分屏，或者 PDF 预览或 Overleaf 编辑器被隐藏起来了，你可以使用 **布局** 菜单，快速重新排列并刷新你的 Overleaf 工作区。

例如，要恢复分屏视图，请选择 **编辑器和 PDF** 来自 **布局** 菜单，如下所示。当前激活的选项旁会显示一个对勾：

![Overleaf 布局菜单](/files/d9e58565cb9864b64fbd66738b5dde21a83822d6)

有关 **布局** 菜单的更多信息，请参阅 Overleaf 帮助页面 [如何使用 Overleaf 布局菜单](/latex/zh-cn/zhi-shi-ku/083-how-to-use-the-overleaf-layout-menu.md).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://overleaf-pro.ayaka.space/latex/zh-cn/zhi-shi-ku/023-can-t-find-the-pdf-viewer.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.