A favicon is the small site icon that appears in the address bar or tabs of most browsers
It is a function of the browser NOT XtGem so it's success and how fast it appears is beyond our control
The standard favicon is a 16x16 image in .ico format named favicon.ico and must be in the root directory
Most browsers will find and use this favicon.ico file automatically for your whole site without the need for any additional code
To back up this automatic action you may wish to add a link to the icon in your headtags file as it also make the icon appear slightly earlier in the page loading
There are endless versions of how to set the parameters for this link most of them are legacy settings and not required by modern browsers
this is the link at it's most simple for a single site icon
<link rel="icon" href="/favicon.ico" />
You can actually use any 16x16 image as a favicon just change the href address
<link rel="icon" href="/images/my_icon.png" />
Note: XtGems image tools cannot display .ico files
You should be able to use individual favicons for pages and subdomains if you declare the link in the head of each page
In theory you should use this form for sites with multiple icons but modern browsers should not be that fussy
<link rel="shortcut icon" href="/favicon.ico" />
Or
<link rel="shortcut icon" href="/images/my_icon.png" />
