Hello,
I've never come across a template that allows you to upload multiple sized favicons before. All the ones I have ever seen are for the standard 16px x 16px which shows on the browser tabs.
It looks like it's something you can add, but we don't provide support on this as it's not part of our core product.
This site here lists several options for Apple products:
http://stackoverflow.com/questions/19029342/favicons-best-practicesYou would just enter these in the template's index.php file right the call for:
require_once("vertex/includes/vertex_includes_header.php");
<!-- non-retina iPhone pre iOS 7 -->
<link rel="apple-touch-icon" href="icon57.png" sizes="57x57">
<!-- non-retina iPad pre iOS 7 -->
<link rel="apple-touch-icon" href="icon72.png" sizes="72x72">
<!-- non-retina iPad iOS 7 -->
<link rel="apple-touch-icon" href="icon76.png" sizes="76x76">
<!-- retina iPhone pre iOS 7 -->
<link rel="apple-touch-icon" href="icon114.png" sizes="114x114">
<!-- retina iPhone iOS 7 -->
<link rel="apple-touch-icon" href="icon120.png" sizes="120x120">
<!-- retina iPad pre iOS 7 -->
<link rel="apple-touch-icon" href="icon144.png" sizes="144x144">
<!-- retina iPad iOS 7 -->
<link rel="apple-touch-icon" href="icon152.png" sizes="152x152">