---
title: partNumber
card_id: 100450
---

# partNumber

```
set [the] partNumber of [ph:part] to [ph:integer]
```

where `[ph:integer]` is in the range 1 through the  sum of buttons <u>and</u> fields in the current card or background

The `partNumber` property retrieves or sets the ordinal position of a button or field (that is, of a <u>part</u>) among the total number of all buttons and fields within the same domain (card or background).

Changing a part's `partNumber` moves it closer to or farther away from the front.

For example, the order of buttons and fields on a card is as follows:

* button 1
* button 2
* field 1
* field 2
* button 3

The `partNumber` of field 1 is 3.

## Examples

```
set the partNumber of field 5 to 1 -- farthest back
set the partNumber of cd field Names to number of parts -- closest
get the partNumber of background button "Home"
```

## Related Topics

* [number (property)](/HyperTalkReference/properties/number-property)