diff --git a/src/calibre/manual/images/sg_genre.jpg b/src/calibre/manual/images/sg_genre.jpg
index b9a4537772..5d9658b14d 100644
Binary files a/src/calibre/manual/images/sg_genre.jpg and b/src/calibre/manual/images/sg_genre.jpg differ
diff --git a/src/calibre/manual/images/sg_tb.jpg b/src/calibre/manual/images/sg_tb.jpg
index eeb5e73c97..63610845db 100644
Binary files a/src/calibre/manual/images/sg_tb.jpg and b/src/calibre/manual/images/sg_tb.jpg differ
diff --git a/src/calibre/manual/sub_groups.rst b/src/calibre/manual/sub_groups.rst
index edfc81d3d4..c27b3581f8 100644
--- a/src/calibre/manual/sub_groups.rst
+++ b/src/calibre/manual/sub_groups.rst
@@ -70,7 +70,7 @@ Then after restarting |app|, you must tell |app| that the column is to be treate
 
 At the point there are no genres in the column. We are left with the last step: how to apply a genre to a book. A genre does not exist in |app| until it appears on at least one book. To learn how to apply a genre for the first time, we must go into some detail about what a genre looks like in the metadata for a book.
 
-A hierarchy of 'things' is built by creating an item consisting of phrases separated by periods. Continuing the genre example, these items would "History.Military", "Mysteries.Vampire", "Science Fiction.Space Opera", etc. Thus to create a new genre, you pick a book that should have that genre, edit its metadata, and enter the new genre into the column you created. Continuing our example, if you want to assign a new genre "Comics" with a sub-genre "Superheros" to a book, you would 'edit metadata' for that (comic) book, choose the Custom metadata tab, and then enter "Comics.Superheros" as shown in the following (ignore the other custom columns):
+A hierarchy of 'things' is built by creating an item consisting of phrases separated by periods. Continuing the genre example, these items would "History.Military", "Mysteries.Vampire", "Science Fiction.Space Opera", etc. Thus to create a new genre, you pick a book that should have that genre, edit its metadata, and enter the new genre into the column you created. Continuing our example, if you want to assign a new genre "Comics" with a sub-genre "Superheroes" to a book, you would 'edit metadata' for that (comic) book, choose the Custom metadata tab, and then enter "Comics.Superheroes" as shown in the following (ignore the other custom columns):
 
 .. image:: images/sg_genre.jpg
     :align: center