Hi Haresh,

If you want to create a custom page that is also editable (for example to add building blocks in it) you have to add a div with the class "oe_structure" inside your XML. The "oe_structure" class will allow you to use building blocks and edit the page. An example:

<?xml version="1.0" encoding="UTF-8"?>
<odoo>
    <record id="client_detail_page" model="ir.ui.view">
    <field name="name">Your page name</field>
    <field name="type">qweb</field>
    <field name="key">module.custompage</field>
    <field name="arch" type="xml">
        <t name="Some custom page" t-name="some_custom_page">
            <t t-call="website.layout">
                <div class="oe_structure">
                    <!-- Any content here (also able to use building blocks in here) -->
                </div>
            </t>
        </t>
    </field>
</record>
</odoo>

Regards,
Yenthe