For example:  You are a teacher’s assistance and you want to make a career change into Graphic Designer in Instructional Videos and Presentations.  Instead of focusing your resume on everyday teacher assistance duties like watching the children, taking roll-call, distributing supplies and teaching materials, enforcing rules and regulations, etc. — you focus on the various instructional videos and presentation that you created for the classes, parent orientation, and teacher’s brown bag lunch sessions (that you did while you were in that role).  You focus and highlight the graphics and software expertise.  You provide actual video, presentation and audio examples of your work.