I must have a different version, but this video was still helpful, bc the icon in the top menu bar was what I needed to learn. THANK YOU for your help!
Apple should've fixed the UI-absurd recorder icon in the menu bar, which no one can intuitively figure out LONG AGo. Then there's the issue of how do you captures jut a portion of the screen?
When I click on "new recording" the black "New Recording" box does not appear, instead there's a pic of a camera. Then I click that on and nothing happens