2 files changed, 7 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index b373221..a0703d2 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,8 @@
 
 * Remove deprecated convertUnderline option.
 
+* Officially support ID prefixes.
+
 * Generated IDs no longer insert a hyphen after the ID prefix.
 
 * The default ID prefix is now the empty string rather than a random number
diff --git a/README.md b/README.md
index 05f19ed..00fa1b2 100644
--- a/README.md
+++ b/README.md
@@ -376,6 +376,11 @@ Converts the source document to HTML.
     
   * `ignoreEmptyParagraphs`: by default, empty paragraphs are ignored.
     Set this option to `false` to preserve empty paragraphs in the output.
+    
+  * `idPrefix`:
+    a string to prepend to any generated IDs,
+    such as those used by bookmarks, footnotes and endnotes.
+    Defaults to an empty string.
 
 * Returns a promise containing a result.
   This result has the following properties: