Camtasia Studio and Camtasia for Mac are software suites used for creating video tutorials and presentations directly via screencast, or via a direct recording plug-in to Microsoft PowerPoint. There are three main elements you need to familiarise yourself with when it comes to Camtasia Studio: zoom and pan, how to cut the timeline and how to use simple callouts. There are an array of online videos that step you through the process from start to finish. Good luck!