codex/app/views/preferences/general.html

<p>Default View when opening the app:<br>
<select class="form-control" style="width: 220px;">
  <option>All Notes</option>
  <option>All Files</option>
  <option>Index note</option>
</select></p>
<p>
  Default Notebook:
  <select class="form-control" style="width: 220px;">
    <option>Notebook 1</option>
    <option>Notebook 2</option>
    <option>Notebook 3</option>
  </select>
</p>