Separator

The simplest way to group related fields is to use ui.separator which visually divides form into subsections.

q.page['example'] = ui.form_card(
    box='1 1 2 4',
    items=[
        ui.separator(label='Separator 1'),
        ui.text('The quick brown fox jumps over the lazy dog.'),
        ui.separator(label='Separator 2'),
        ui.text('The quick brown fox jumps over the lazy dog.'),
        ui.separator(label='Separator 3'),
        ui.text('The quick brown fox jumps over the lazy dog.'),
    ]
)

Check the full API at ui.separator.