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-rw-r--r--docs/mutool/run.html11
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diff --git a/docs/mutool/run.html b/docs/mutool/run.html
index 5d5d73fd..23286f07 100644
--- a/docs/mutool/run.html
+++ b/docs/mutool/run.html
@@ -589,6 +589,17 @@ Do NOT mix and match objects from one document with another document!
</dl>
<p>
+The following functions can be used to copy objects from one document to another:
+
+<dl>
+<dt>PDFDocument#graftObject(sourceDocument, object, sourceGraftMap)
+<dd>Deep copy an object into the destination document. The graft map may be null, but should be used if you
+are copying several objects from the same source document using multiple calls to graftObject.
+<dt>PDFDocument#newGraftMap()
+<dd>Create a graft map for the source document, so that objects that have already been copied can be found again.
+</dl>
+
+<p>
All functions that take PDF objects, do automatic translation between JavaScript objects
and PDF objects using a few basic rules. Null, booleans, and numbers are translated directly.
JavaScript strings are translated to PDF names, unless they are surrounded by parentheses: