To invert a mask in After Effects, simply select the layer with the mask, then press "M" to access the Mask Path property in the Timeline panel. Next, check the "Inverted" box. This will reverse the mask, making the area inside the mask hidden and the area outside the mask visible.
Here are a few other ways to invert a mask in After Effects:
- Using the "Subtract" option: In the Mask Mode pop-up menu, choose "Subtract". This will subtract the masked area from the original layer.
- Using the "Cmd/Ctrl+I" shortcut: Select the mask, then press "Cmd/Ctrl+I" to invert the mask. This works similarly to the "Inverted" checkbox, but provides a quicker way to invert the mask.
Example: If you have a mask around a circle, inverting the mask will make the circle disappear and reveal the background behind it.
Note: Inverting a mask is a simple process that can be done in seconds. It's a useful technique for creating various effects, including revealing hidden elements, creating negative space, and making complex transitions.
