<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="view_order_form" model="ir.ui.view">
        <field name="name">sale.order.form</field>
        <field name="model">sale.order</field>
        <field name="inherit_id" ref="sale.view_order_form" />
        <field name="arch" type="xml">
            <button name="action_draft" position="after">
                <button
                    name="action_split"
                    invisible="state != 'draft' or split_strategy_id == False"
                    type="object"
                    string="Split"
                />
            </button>
            <group name="sales_person" position="inside">
                <field name="split_strategy_id" />
            </group>
        </field>
    </record>
</odoo>
