diff --git a/lib/doc/UserGuide.lyx b/lib/doc/UserGuide.lyx
index 08ab043c72..0f3760bf8d 100644
--- a/lib/doc/UserGuide.lyx
+++ b/lib/doc/UserGuide.lyx
@@ -123,10 +123,11 @@
 \papercolumns 1
 \papersides 2
 \paperpagestyle default
-\tracking_changes false
+\tracking_changes true
 \output_changes false
 \html_math_output 0
 \html_be_strict true
+\author 5863208 "ab" 
 \end_header
 
 \begin_body
@@ -2531,6 +2532,10 @@ Additional Features
 \end_layout
 
 \begin_layout Subsubsection
+
+\change_inserted 5863208 1293405980
+Class 
+\change_unchanged
 Availability
 \end_layout