# User Interface

### Crypto payment section

* <mark style="color:blue;">**Customer Email:**</mark> Please insert in this field the customer email if he/she wants to recieve a summary of the crypto purchase
* <mark style="color:blue;">**Billing Price:**</mark> you have to complie this field with the subtotal amount in EURO of the client purchase

{% hint style="warning" %}
Only The <mark style="color:blue;">**Billing Price**</mark> is mandatory&#x20;
{% endhint %}

<figure><img src="/files/7jTikPOv9bFThRVLSBVQ" alt=""><figcaption></figcaption></figure>

### Top Left Corner Menu

* <mark style="color:blue;">**Home button:**</mark> you can use the home button to return in the homepage of POS
* <mark style="color:blue;">**History:**</mark> the history button helps you to have a detailed [**transaction data and reports**](/point-of-sale/transactions-and-reports.md)
* <mark style="color:blue;">**Settings:**</mark> you can change o reset your POS&#x20;

<figure><img src="/files/aUhDH2ZCIDoUry9X2gLB" alt=""><figcaption></figcaption></figure>

### Top right corner&#x20;

You can easily view your notifications about any available update, and language section&#x20;

<figure><img src="/files/Wwh9jIoYsK4PNm4rZLzG" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/s3ZBk3o6ld8wI9VLozu1" alt=""><figcaption></figcaption></figure>

### Help Chat

On the right bottom you can find a support chat section for any extra assistance.

<figure><img src="/files/fvIZWIvm5BUyPIyc6fnt" alt=""><figcaption></figcaption></figure>


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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://docs.coinbar.io/point-of-sale/user-interface.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.