If you are using Zoom to record your screen for the first time, do a small test recording to see how everything will look before recording you're real presentation!
Sometimes your project will require the use of screen recording software, such as Camtasia, to record a powerpoint presentation, or a software tutorial. Recording with Camtasia can be done on the Post-Production Mac within the One Button Studio. See Camtasia's website for tutorials on how to use the software for screen recording.