Sony DVS-7300 System User Manual page 82

Key transitions
Inserting or removing a single key
This inserts or removes key 1 or key 2 in the current video.
Key 1 or key 2
Inserting key
Removing key
Inserting and removing key 1 or key 2
Inserting or removing both keys simultaneously
This inserts or removes both key 1 and key 2 in the current video.
Key 1
Inserting keys
Removing keys
Key 2
Inserting and removing key 1 and key 2 simultaneously
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Chapter 4 Basic Operations for Image Creation