sorbetcms/admin/scripts/markitup/sets/html/style.css

.markItUpButton1 a{background-image:url(images/paragraph.png)}.markItUpButton2 a{background-image:url(images/bold.png)}.markItUpButton3 a{background-image:url(images/italic.png)}.markItUpButton4 a{background-image:url(images/stroke.png)}.markItUpButton5 a{background-image:url(images/list-bullet.png)}.markItUpButton6 a{background-image:url(images/list-numeric.png)}.markItUpButton7 a{background-image:url(images/list-item.png)}.markItUpButton8 a{background-image:url(images/link.png)}.markItUpButton9 a{background-image:url(images/quotes.png)}.markItUpButton10 a{background-image:url(images/code.png)}.markItUpButton11 a{background-image:url(images/clean.png)}