DOC: how to revert MultiIndex.to_flat_index
diff --git a/pandas/core/indexes/multi.py b/pandas/core/indexes/multi.py
index c80dadcc42022..ad10b41093f27 100644
--- a/pandas/core/indexes/multi.py
+++ b/pandas/core/indexes/multi.py
@@ -1787,6 +1787,10 @@ def to_flat_index(self):
         pd.Index
             Index with the MultiIndex data represented in Tuples.
 
+        See Also
+        --------
+        MultiIndex.from_tuples : Convert flat index back to MultiIndex.
+
         Notes
         -----
         This method will simply return the caller if called by anything other

Took me way too long to figure this out. Hopefully this benefits someone else!