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These two keys specify the number of rows and columns in a textarea input.

echo $form->input('textarea', array('rows' => '5', 'cols' => '5'));

1. echo $form->input('textarea', array('rows' => '5', 'cols' => '5'));

Output:

<div class="input text">
    <label for="FormTextarea">Textarea</label>
    <textarea name="data[Form][textarea]" cols="5" rows="5" id="FormTextarea" >
    </textarea>
</div>

1. <div class="input text">
2. <label for="FormTextarea">Textarea</label>
3. <textarea name="data[Form][textarea]" cols="5" rows="5" id="FormTextarea" >
4. </textarea>
5. </div>