✓ Move your mouse cursor to the Video Preview window. 500 or nearby, so that you can see the entire video at least partially as you create your mask. ✓ Click the arrow next to General Options.
You may not necessarily need the Curve tool in your video, but if you have non-square corners you want to cut out, as we do in this example, you’ll want the Curve to get the most exact mask.
In the Type drop-down list, choose Curve. ✓ Next to Mask 1, click the arrow to open the Mask 1 controls. We don’t necessarily have to cut the screen out to achieve the effect, but in this example, it will help the overall result look more realistic. Now we’ll use the controls to cut the screen out of the device in the video.