clinic/netforce_clinic/layouts/clinic_setting.xml

<form model="clinic.setting" title="Clinic Settings">
    <tabs>
        <tab string="Testing">
            <field name="file"/>
            <newline/>
        </tab>
        <tab string="General">
            <separator string="Labor Cost"/>
            <field name="var_k"/>
        </tab>
    </tabs>
    <foot>
        <button string="Make Visit" method="make_visit"/>
        <button string="Make HD Case" method="make_done"/>
        <button string="Complete HD Case" method="make_complete"/>
    </foot>
</form>