Yamaha SY77 Operating Manual page 204

SONG MODE
using the Copy Measure operation with settings
of "Source = 002...004", "Destmation=006",
and "Copy=l" would change the track data as
follows.
SONG EDIT JOBS
Summary: This operation erases all data from
specified measures of one or more selected
tracks, leaving the measures empty.
Procedure:
From: song edit job directory
Select: 11:ErsMeas
Specify: the area of track measures which you
wish to erase.
To execute: the operation press ENTER.
To quit: without executing press EXIT.
Area (001...999): The measures beginning with
the specified Top Measure and ending with the
specified Last Measure will be erased.
Example: For track data as shown in the following
diagram,
192
If "Copy=2", the track data would change as
follows.
11. Erase measure
(JUMP #600)
(JUMP #611)
using the Erase Measure operation with set-
tings of "Area = 002...004" would change the
track data as shown in the following diagram.