Board Thread:Support Requests - Getting Started/@comment-26428164-20150627011529/@comment-17033657-20150627020138

To change the favicon (if that's what you're talking about), the simplest way is to go to your wiki's ThemeDesigner, click the "Wordmark" tab on the left, and the Favicon section is on the far right. Keep in mind that the image must be at most 16x16, and I'm pretty sure you can only used the ".ico" extension.