When comparing workbooks, one may have many rows added in places. Users need
to be able to interrupt synchronous scrolling to scroll past the added rows
in one workbook, then resume sync scrolling. Without this ability, the
compare workbooks feature has limited usefulness.
The existing implementation seems to require me to reset both workbooks,
scroll to the area of interest then resume the compare feature. Very
cumbersome.
If there is a way to interrupt and resume the sync scroll, it should be
documented in help.

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