Copy  eq2ui.xml and eq2ui_mainhud_skills.xml to your custom ui directory. Overwrite any files that exist. If you have edited eq2ui.xml aready and do not wish to replace this file insert the following code at the end of the file before the </page>
<include>eq2ui_commonelements.xml</include>
<include>eq2ui_textstyles.xml</include>
<include>eq2ui_shadowstylesnew.xml</include>
<include>eq2ui_specialelements.xml</include>
<include>eq2ui_arenachampions.xml</include>