diff --git a/addons/sale/views/sale_order_views.xml b/addons/sale/views/sale_order_views.xml
index c0f60fd599d..66c27b11bcc 100644
--- a/addons/sale/views/sale_order_views.xml
+++ b/addons/sale/views/sale_order_views.xml
@@ -253,6 +253,7 @@
                     attrs="{'invisible': [('state', 'not in', ['draft'])]}"/>
                 <button name="action_quotation_send" type="object" string="Send PRO-FORMA Invoice" groups="sale.group_proforma_sales" attrs="{'invisible': ['|', ('state', '=', 'draft'), ('invoice_count','&gt;=',1)]}" context="{'proforma': True, 'validate_analytic': True}"/>
                 <button name="action_quotation_send" string="Send by Email" type="object" states="sent,sale" data-hotkey="g" context="{'validate_analytic': True}"/>
+                <button name="action_preview_sale_order" string="Preview" type="object" class="btn-secondary"/>
                 <button name="action_cancel" type="object" string="Cancel" attrs="{'invisible': ['|', ('state', 'not in', ['draft', 'sent','sale']), ('id', '=', False)]}" data-hotkey="z"/>
                 <button name="action_draft" states="cancel" type="object" string="Set to Quotation" data-hotkey="w"/>
                 <field name="state" widget="statusbar" statusbar_visible="draft,sent,sale"/>
@@ -271,15 +272,6 @@
                         attrs="{'invisible': [('invoice_count', '=', 0)]}">
                         <field name="invoice_count" widget="statinfo" string="Invoices"/>
                     </button>
-                    <button name="action_preview_sale_order"
-                        type="object"
-                        class="oe_stat_button"
-                        icon="fa-globe icon">
-                        <div class="o_field_widget o_stat_info">
-                            <span class="o_stat_text">Customer</span>
-                            <span class="o_stat_text">Preview</span>
-                        </div>
-                    </button>
                 </div>
                 <div class="oe_title">
                     <h1>
@@ -737,6 +729,10 @@
                     <button name="action_done" type="object" string="Lock"
                         states="sale"
                         help="If the sale is locked, you can not modify it anymore. However, you will still be able to invoice or deliver." groups="sales_team.group_sale_manager"/>
+                </t>
+            </button>
+            <button name="action_preview_sale_order" position="before">
+                <t groups="sale.group_auto_done_setting">
                     <button name="action_unlock" type="object" string="Unlock"
                         states="done"
                         groups="sales_team.group_sale_manager"/>