# using a callback function
field :level, as: :select, options: { 'Beginner': :beginner, 'Advanced': :advanced }, default: -> { Time.now.hour < 12 ? 'advanced' : 'beginner' }
```

## Help text

Sometimes you will need some extra text to explain better what the field is used for. You can achieve that by using the `help` method.
The value can be either text or HTML.

```ruby