Key Copy
You can copy the entire contents of a keyer or layer to another keyer or layer in the same, or a different ME. The entire contents of the destination keyer are replaced with the contents of the source keyer.
When you copy a key or layer, the switcher tries to assign resources to the destination key to match the source key. If these resources are not available, the switcher steals resources from the highest numbered key that isn't on-air. If all the resources are used by on-air keys, the copy will not take the resource.