Sony OXFORD Operation Manual page 277

Advance the in-point:
Push the CUT switch earlier and hold until the original
in-point is passed, then release.
ACTION
Advance the out-point:
Push the CUT switch and hold during the original cut,
then release at the new (earlier) out-point.
ON
TIME
CUT
ON
TIME
CUT
PUSH
& HOLD
TIME
CUT
ON
TIME
CUT
PREVIOUS
MODIFIED CUT
PREVIOUS
CUT
MODIFIED CUT
PUSH
& HOLD
CUT
Chapter 7 Session Management
7-17