netbox-community-netbox/netbox/templates/dcim/cable_edit.html

{% extends 'utilities/obj_edit.html' %}
{% load form_helpers %}

{% block form %}
    <div class="panel panel-default">
        <div class="panel-heading"><strong>Cable</strong></div>
        <div class="panel-body">
            {% render_field form.type %}
            {% render_field form.status %}
            {% render_field form.label %}
            {% render_field form.color %}
            <div class="form-group">
                <label class="col-md-3 control-label" for="id_length">{{ form.length.label }}</label>
                <div class="col-md-6">
                    {{ form.length }}
                </div>
                <div class="col-md-3">
                    {{ form.length_unit }}
                </div>
            </div>
        </div>
    </div>
{% endblock %}