Which of the following command is not true?

Which among the following is not the method to create a mask in After Effects?

Which channel contains the transparency information?

Which among the following is a visual effect and not an audio effect and must be applied to a video layer?

A mask cannot be locked.

What would be used to add color to a background or create simple graphic images using mask and layer properties?

What is a camera layer?

What term describes transparency?

What is the keyboard shorcut for the hand tool?

What is the shortcut for paste?

What is the shortcut for copying?