I currently have a need to output an additional form at the top of the page in the Browsable API view. I'm happy creating a Renderer class with custom template to achieve this. But currently, if I want to preserve the existing functionality in the template, my only option is to copy the entire contents of the content block from base.html - which is less than ideal.

Breaking the content block up into a few smaller blocks would make it easier to override just the relevant part of the template, while introducing very few downsides. For example, adding a form to the top of the page could become as simple as doing this in a custom template:

{% block request_forms %}
    {{ block.super }}
    <div class="my-custom-form"></div>
{% endblock %}