> 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/knowledge-base/023-can-t-find-the-pdf-viewer.md).

# Can't find the PDF viewer

If you cannot see a split screen containing the Overleaf editor and PDF preview, or the PDF preview or Overleaf editor is hidden from view, you can use the **Layout** menu to quickly rearrange and refresh your Overleaf workspace.

For example, to restore a split screen view, select **Editor & PDF** from the **Layout** menu as shown below. A checkmark is placed next to the currently active option:

![The Overleaf layout menu](/files/k1DVqkYlFuWy3whiB8dX)

For more information on the **Layout** menu see the Overleaf help page [How to use the Overleaf layout menu](/latex/knowledge-base/083-how-to-use-the-overleaf-layout-menu.md).


---

# Agent Instructions
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## 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/knowledge-base/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.

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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.
