&lt;strong&gt;Image URL: &lt;/strong&gt;Add your 16 x 16 px icon images here.&lt;br/&gt;&lt;br/&gt;
&lt;strong&gt;Link URL: &lt;/strong&gt;Add the link of the icon button here.&lt;br/&gt;&lt;br/&gt;
&lt;strong&gt;Caption: &lt;/strong&gt;This is the text shown on hover.