> For the complete documentation index, see [llms.txt](https://happybara.gitbook.io/streamly/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://happybara.gitbook.io/streamly/reference/streams/modify/field-library.md).

# Field library

### To [create](/streamly/reference/streams/modify/field-library/create.md) or [modify](/streamly/reference/streams/modify/field-library/modify.md) the fields available in [form builder](/streamly/reference/streams/modify/form-builder.md) for a [Stream](/streamly/concepts/stream.md), select:classical\_building:`Field library` from the overflow menu (<img src="/files/-M9jiC-hBUmQLo6YZeMn" alt="" data-size="line">) in the **`Streams`** section of the app home.

#### To **create** a field, select a [**field type**](/streamly/reference/streams/modify/field-library/types.md) from the menu at the top of the modal.

{% content-ref url="/pages/-M8LSRrLe0-rFafCmjWl" %}
[Create a field](/streamly/reference/streams/modify/field-library/create.md)
{% endcontent-ref %}

#### To **modify** a field, click the :gear:`Edit`  button below the field.

{% hint style="warning" %}
[**Some**](/streamly/reference/streams/modify/field-library/types.md) fields cannot be modified.
{% endhint %}

{% content-ref url="/pages/-M8LSUv\_4twBiywb0l5c" %}
[Modify a field](/streamly/reference/streams/modify/field-library/modify.md)
{% endcontent-ref %}

#### To **delete** a field, click the :bomb:`Delete`  button below the field.

{% hint style="warning" %}
[**Some**](/streamly/reference/streams/modify/field-library/types.md) fields cannot be deleted.

Deleting a field that is **currently** on your [**Request**](/streamly/concepts/request.md) form will **remove** it from the form and may cause **changes** to the field in integrated components ([**Sheets**](/streamly/reference/integrations/tools/smartsheet.md)).
{% endhint %}