# TXT Viewer

The TEXT Viewer is a highly convenient tool that allows you to read text files directly on the IODD's built-in display without needing to connect to a operating system.

### Supported Formats

To ensure proper rendering of text on the small display, please check the encoding of your files:

* **Supported Encodings**: **UTF-16 (UCS-2)** and **ASCII**.
* **Incompatibility**: Certain Asian character codes and complex encodings may **not be supported**.

{% hint style="info" %}
**Encoding Tip** If a text file appears garbled or shows broken characters, try re-saving the file on your PC using **UTF-16 Little Endian** encoding for the best compatibility.
{% endhint %}

***

### How to Use

1. Navigate through your IODD's file list to find the desired `.txt` file.
2. Highlight the file and press the **\[Enter]** (or **\[5]**) key to open it.

***

### Navigation Controls

Use the hardware keypad to scroll through and read your documents:

|                Key               | Action        | Description                                   |
| :------------------------------: | ------------- | --------------------------------------------- |
| ![](/files/cB683jSVBXhak23059V5) | **Line Up**   | Scroll up by a single line.                   |
| ![](/files/YyA7oAH99iBV4QLj4CDG) | **Line Down** | Scroll down by a single line.                 |
| ![](/files/j7XDYsNRs7hLCfkCub7z) | **Page Up**   | Jump to the previous page.                    |
| ![](/files/NlsFouWt9HTBbee1t7Hu) | **Page Down** | Jump to the next page.                        |
| ![](/files/0oGOlwTGucTb0Emg6DCf) | **Exit**      | Close the viewer and return to the file list. |
| ![](/files/72xk15vH1VIDBp3y2Gi0) | **Open**      | Open the selected TXT file.                   |

***

{% hint style="info" %}
**Practical Use Case** This feature is particularly useful for storing **Windows Serial Keys**, **IP addresses**, or **step-by-step installation instructions** that you need to reference while the host computer is being formatted or offline.
{% endhint %}

### Advanced Maintenance

If you need to manage many text files, you can verify their presence and encoding via your terminal before disconnecting the IODD:

```bash
    # Check file encoding on macOS/Linux
    $ file -I /Volumes/IODD/_ISO/notes.txt
```


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# Agent Instructions: 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:

```
GET https://help.iodd.kr/various-functions/txt-viewer.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.