How to define page.meta.disable_toc ?

[hasanozdem1r]

I want to create homepage with md-12 but I am not able to find out where to define disable_toc parameter ?

<div class="container">
      {% block content %}
      {% if page.meta.disable_toc %}
      <div class="col-md-12" role="main">{% include "content.html" %}</div>
      {% else %}
      <div class="col-md-4">{% include "toc.html" %}</div>
      <div class="col-md-8" role="main">{% include "content.html" %}</div>
      {% endif %}
      {% endblock %}
  </div>

If anyone faced with same problem please can help me ?