When you start Filmora scrn for Mac your recent projects are listed, as well as a quick menu leading to two different working modes: Quick Capture and Video Editor.
There are two different ways to record your screen: through the Setup window and using Quick Capture
Click on the plus icon by Create new and the Setup window will pop up.
Here, you can adjust your default screen recording settings:
And your audio recording settings:
And the settings for recording from a webcam:
Click on the "Quick Capture" button and a quick recording window will pop up:
You can adjust your settings here before recording.
Head over to Video Editor to access the video editing interface.