This property determines if incremental update should be
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
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.