# Javascript: PageNumberField.setStartNumber Method

> Sets the page number for the first page.

- **Product:** DS Server
- **Section:** Reference
- **Kind:** Method
- **Introduced:** 30.0
- **Path:** DS Server > Reference > JavaScript API > Javascript: PageNumberField.setStartNumber Method
- **422 words**
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/javascript/pagenumberfield/setstartnumber-method/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/javascript/pagenumberfield/setstartnumber-method/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/javascript/pagenumberfield/setstartnumber-method/llms-full.txt

---

### Description

Sets the page number for the first page.

### Syntax

```javascript
<void> PageNumberField.setStartNumber(<number> value, [<EmptyRequestCallback> callback])
```

### Parameters

| Parameter | Description |
|---|---|
| value | The property value. |
| callback | Optional. Is called when the operation completed. |

### Examples

The following example demonstrates `PageNumberField.setStartNumber` in a practical document-editing workflow. It sets the page number for the first page.

```javascript
function onTxError(error) {
    console.error("TX Text Control error:", error.msg);
    error.handled = true;
}

TXTextControl.textParts.getMainText(function(mainText) {
    const pageNumberFields = mainText.pageNumberFields;
    pageNumberFields.getItem(function(pageNumberField) {
        if (!pageNumberField) {
            console.warn("No page number field is available at the current input position.");
            return;
        }
    
        pageNumberField.setStartNumber(
            1,
            function() {
                console.log("set start number completed.");
            }
        );
    }, onTxError);
}, onTxError);
```

---

## Nearby

- **Previous:** [Javascript: PageNumberField.setShowNumberOfPages Method](https://docs.textcontrol.com/ds-server/reference/javascript/pagenumberfield/setshownumberofpages-method/llms-full.txt)
- **Next:** [PageNumberFieldCollection Object](https://docs.textcontrol.com/ds-server/reference/javascript/pagenumberfieldcollection/llms-full.txt)