see step 10.
I understand that part. What I don't understand is step 13.
Copy the Masking1 movie-clip and paste it to the new layer names. How did they get the Masking movie-clip?
1 person found this helpful
that's step 3:
Select the image and convert it to the movie-clip symbol by the name as pic1. Again convert pic1 symbol to movie-clip symbol using the name as Masking1.
For every "pic1" in the timeline needs to change names. OK I got it now.