# Using fieldsets

## Configuring fieldsets

Configuring Fieldsets is done within the Site Builder under the Forms section.

### Adding Fieldsets to a Form

When editing a Form, you can add and order Fieldsets. When adding a fieldset, you will be setting a "Slug" value. This value is used to group and assign fields and should be entered as just letters, numbers and dashes (i.e. `custom-fieldset`).

![](/files/-MQmWHGNleNpG-Br94t4)

You also have the option to enable a Legend for the Fieldset (optional). If set, this will add a `<legend>` attribute to the top inside the `<fieldset>` element. This legend can be used to label that group of fields for the visitor.

### Assigning Fields to a Fieldset

Each field can be assigned using the `slug` value of the Fieldset. This value is entered into the "In Fieldset" field under the "Advanced" section when editing a particular Field.

![](/files/-MQmWKtMyoAEMbXINBwn)

## Default Fieldset

If a field is not assigned to a Fieldset, it will be added to a default `<fieldset>` at the first position within the form. For example, if you just add a form with 3 fields with no custom Fieldset, then the form will contain the single `<fieldset>` element with all of your 3 fields within it.

If all fields within the form are assigned to custom Fieldsets, then the first default `<fieldset>` will not be output into the HTML.


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