User blog comment:Wewew999/Getting Infos/@comment-12814990-20131205013332/@comment-5984952-20131207023014

Striker10, go to Special:UserRights, type the user's name you want to be an administrator in the box and click in "Edit user group". Mark the first option, which is "administrator", put a reason for giving the user the administrator right if you want, and then click in "Save user groups".

Hope I've helped you. :)