Sony MVS-8000X User Manual page 192

Inserting a key with simultaneous transitions: With the key not inserted, it
Time offset execution
If the [AUTO TRANS] buttons for the two transitions are pressed with a time
offset, the following is the result.
Note that in both cases the common transition is a wipe and the independent
key transition is a mix (dissolve).
Time offset execution with the key inserted: With the key inserted, it is
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Independent Key Transitions
Deleting a key with simultaneous transitions
is inserted simultaneously with the two transitions. If the common
transition or independent key transition ends first, the other continues to
completion.
Inserting a key with simultaneous transitions
deleted with the two transitions acting with a time offset.
Whichever button is pressed first, when the common transition completes,
even if the independent key transition is still not completed, the two end
simultaneously.
The key is deleted,
Wipe and mix
even if the
(dissolve) are
independent key
carried out
transition has not
simultaneously.
completed.
Wipe and mix The transitions
(dissolve) are continue until both
carried out are completed.
simultaneously.