pos_multi_currency/pos_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
    
    <record model="ir.ui.view" id="view_pos_config_form">
		<field name="name">POS Multi-Currency</field>
		<field name="model">pos.config</field>
		<field name="inherit_id" ref="point_of_sale.view_pos_config_form"/>
		<field name="arch" type="xml">
			<xpath expr="//group[@string='Features']" position="before">
				<group string="Multi-Currency Options">
					<group>
						<field name="multi_currency_enable" />
						<field name="display_conversion" />
					</group>
					<group>
						<field name="fetch_master" string="Fetch All Values from Currency Master" />
					</group>
				</group>
				<field name="currency_lines" attrs="{'invisible':[('fetch_master','=',True)]}">
					<tree editable="bottom">
						<field name="currency_id" />
						<field name="rate_silent" />
					</tree>
				</field>

			</xpath>
		</field>
	</record>
	
    </data>
</openerp>