diff --git a/EnvelopeGenerator.PdfEditor/Edit.cs b/EnvelopeGenerator.PdfEditor/Edit.cs
index a974afc1..c6abe5da 100644
--- a/EnvelopeGenerator.PdfEditor/Edit.cs
+++ b/EnvelopeGenerator.PdfEditor/Edit.cs
@@ -54,9 +54,10 @@ namespace EnvelopeGenerator.PdfEditor
             }
         }
 
-        public static Edit<MemoryStream, MemoryStream> OnByte(byte[] documentBytes)
+        public Edit<TInputStream, TOutputStream> Document(Action<PdfDocument> edit)
         {
-            return new Edit<MemoryStream, MemoryStream>(new MemoryStream(documentBytes), new MemoryStream());
+            edit(_doc);
+            return this;
         }
 
         #region Finalizer