Film Masks aid you in determining what will be projected on film by adding reticles and or a variable opacity mask to the image. The following aspect ratio's are supported: 2:40 Common Center, 2:40 Common Top, 1:85, 1:78, 1:75, 1:66, 1:37, 1:33 and the TV Transmitted Area, Safe Action and Safe Title for NTSC video.