Allow inserting nodes before and after result

[Shushe] / README.markdown

diff --git a/README.markdown b/README.markdown
index 681e8c4acb2940d25bbf528cf62b013c5fe093ca..893ac2c47230e55c4e2b59e93f31553dc25d5145 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -319,6 +319,14 @@ After performing the initial transform, ⛩️📰 书社 will match the root
   node of the result in the following modes to fill in areas of the
   wrapper :⁠—
 
+- **`书社:header`:**
+  The result of matching in this mode is prepended into the
+    `<html:body>` of the output (before the transformation result).
+
+- **`书社:footer`:**
+  The result of matching in this mode is appended into the
+    `<html:body>` of the output (after the transformation result).
+
 - **`书社:metadata`:**
   The result of matching in this mode is inserted into the
     `<html:head>` of the output.