account-financial-tools/account_loan/wizards/account_loan_pay_amount_view.xml

<?xml version="1.0" encoding="utf-8" ?>
<!-- Copyright 2011 Alexis de Lattre <alexis.delattre@akretion.com>
     Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
<odoo>
    <record id="account_loan_pay_amount_form" model="ir.ui.view">
        <field name="name">Pay amount</field>
        <field name="model">account.loan.pay.amount</field>
        <field name="arch" type="xml">
            <form string="Pay amount">
                <group>
                    <field name="loan_id" readonly="True" />
                    <field name="date" />
                    <field name="cancel_loan" />
                    <field name="amount" />
                    <field name="fees" />
                    <field name="currency_id" />
                </group>
                <footer>
                    <button
                        name="run"
                        string="Run"
                        type="object"
                        class="oe_highlight"
                    />
                    or
                    <button string="Cancel" class="oe_link" special="cancel" />
                </footer>
            </form>
        </field>
    </record>
    <record id="account_loan_pay_amount_action" model="ir.actions.act_window">
        <field name="name">Pay amount</field>
        <field name="res_model">account.loan.pay.amount</field>
        <field name="view_mode">form</field>
        <field name="target">new</field>
        <field name="context">{'default_loan_id': active_id}</field>
    </record>
</odoo>