changes
The changes that later revisions made after signing, each with whether the certification level and the field locks allow it. Empty when the file did not change after signing. Null when KitePDF cannot read the signed revision to compare it.
The changes that later revisions made after signing, each with whether the certification level and the field locks allow it. Empty when the file did not change after signing. Null when KitePDF cannot read the signed revision to compare it.