Denzel Chia
Moderator
Post count: 3211
Been thanked: 128 times
#26456 |

Hi,

First of all.

Put the shortcode example in your WordPress text editor, not the WordPress visual editor.

As for the undefined index, they are notices, not errors.
Please set your WP_DEBUG to false.

To change icon size, you can add fa-2x to the icon class.
<i class='fa fa-twitter fa-2x'></i>
It probably works up to fa-4x

Thank you