<a class="waves-effect waves-light btn-medium modal-trigger" href="#modal1">Tell us about yourself</a>
<!-- Modal Structure -->
<div id="modal1" class="modal">
  <div class="modal-content">
    <div class="input-field col s12">
      <textarea id="personal_info" class="materialize-textarea" length="120" name="user[personal_info]"><%= @user.personal_info %></textarea>
      <p>
        Please tell us more about yourself
      </p>
      <label for="personal_info">About me</label>
    </div>
  </div>
  <div class="modal-footer">
    <a href="#!" class=" modal-action modal-close waves-effect waves-green btn-flat">Back to Form</a>
  </div>
</div>

<a class="waves-effect waves-light btn-medium modal-trigger" href="#modal1">Tell us about yourself</a>
<!-- Modal Structure -->
<div id="modal1" class="modal">
  <div class="modal-content">
    <p>
      Please tell us more about your quirks.
    </p>
    <div class="input-field col s12">
      <textarea id="personal_info" class="materialize-textarea" length="120" name="user[personal_info]"><%= @user.personal_info %></textarea>
      <label for="personal_info">About me</label>
    </div>
  </div>
  <div class="modal-footer">
    <a href="#!" class=" modal-action modal-close waves-effect waves-green btn-flat">Back to Form</a>
  </div>
</div>

Add helper text to registration form
Add helper text to registration form
