Process > Find/Change The Process > Find/Change command is an extremely flexible way of manipulating the data
parameters of events. It works something like the search-and-replace function in a word processor
but with scaling rather than simple replacement.
This command uses two event filters. The first event filter lets you set up your search criteria. The
second event filter is used to define the replacement value ranges. When an event satisfies the
search criteria, its parameters are scaled between the search ranges and the replacement ranges.
This permits transposition, inversion, key signature changes, and other operations to be
accomplished with this one simple command.
In the second Event Filter dialog box, the check boxes and value ranges for beats and ticks are
ignored. Only the replacement value ranges for the selected event types are used.
The Process > Find/Change command understands a wild card octave number in the second event
filter to mean, “replace the original note with a different note in the original octave.” Using octave wild
cards for both the search and replacement event filters lets you, for instance, change all E-flats to Enaturals,
preserving the octave of each note.
A few examples will illustrate some of the many uses of the Process > Find/Change command.
These examples apply to the note event type, though the command can be used on any type of
event.
The above is from page 737 in the Reference manual for X2.