| This
property determines if incremental update should be used. Incremental update
leaves the structure of any original document intact and appends any changes to
the end of the file. Because the original PDF is unchanged it is possible
to revert back to the state before the changes were applied. Because only updated
objects are written to disk it can result in faster write times. However
most importantly you have to use incremental update if you wish to preserve any
signed signature fields present in the document. Indeed after any signature field
is signed you need to commit changes to file using incremental update.
Incremental
Update is incompatible with the Linearization, Remapping and CompressObjects options.
As such it will override these settings.
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