&lt;p&gt;&lt;strong&gt;Enable Promotion Code&lt;/strong&gt;: To enable promotion code for the gallery tick this checkbox.&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Enable Multiple Promotion Codes on the same Purchase&lt;/strong&gt;: To allow users to use more than promotion code on the same order tick this checkbox.&lt;/p&gt;
&lt;p&gt;Click on the&amp;nbsp;&lt;strong&gt;Submit&lt;/strong&gt; button to save the changes.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;