Hi,
The shortcode uses Font Awesome, here’s the list with most of the available icons: http://fortawesome.github.io/Font-Awesome/icons/ (I said “most”, because the theme is using FontAwesome 3, not 4 – and there’s no cheatsheet for 3 anymore, so the new icons in 4 are not available).
Now, when you insert an icon, it basically inserts a shortcode that looks like this, for example:
[icon image="beaker" size="small" cont="yes/no"]
You only need to change the image=”” part. If you look at the link I provided, we can change the shortcode to show the “anchor” icon instead, just by having it like this:
[icon image="anchor" size="small" cont="yes/no"]
So you can use the link to check the icon names and use them in the shortcode, without that “fa-” in front of them.
Hope this helps.
Regards,
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Cosmin
UDTHEMES Support