Using keys to superimpose and create compositesAdobe Premiere provides 15 keys (methods for creating transparency) that you can apply to a clip to create transparency in many different ways. You can use color-based keys for superimposing, brightness keys for adding texture or special effects, alpha channel keys for clips or images already containing an alpha channel, and matte keys for adding traveling mattes or creative superimpositions. In some cases, you can make keying easier by using a temporary brightly colored background matte. A bright color underneath the image you are keying makes it easier to see areas of transparency. See Adding a background matte. To apply a key to a clip:
![]() The default key type is None. At this setting, no part of the superimposed image is keyed out. However, you can set the opacity of the image by adjusting the opacity rubberband in the Timeline (see Using the Video Opacity rubberband). You can also use the None key type for creating split screens and other effects where a portion of the underlying image is visible (see Creating split screens). Places a black or white background behind the keyed-out image. Click to toggle between black and white. Displays a checkerboard pattern to help you view transparency in areas that may be difficult to see against a solid background or against the actual underlying image. Click to reverse the checkerboard pattern. Displays the actual underlying image in your project. This view may be slower to display when you drag the preview slider under the Sample box. Note: You can quickly access the transparency settings for a clip by clicking Setup next to Transparency in the Effect Controls palette. Related Subtopics: |