As per the Envato support policy here, theme or else any item customizations are not covered in support.
If you are interested in having a particular customization carried out for you, we recommend reaching out to our able team here: services.xtendify by filling in and submitting the form within the page. Our team will then get back to you in regards to the desired customization.
Should the above approach not be okay for you, you may also consider hiring a developer to assist you with the customization.