diff --git a/src/OEBPS/Images/Manage_Plugins.png b/src/OEBPS/Images/Manage_Plugins.png
index b8dd493..b973fa7 100644
Binary files a/src/OEBPS/Images/Manage_Plugins.png and b/src/OEBPS/Images/Manage_Plugins.png differ
diff --git a/src/OEBPS/Images/Sigil_Plugins_Menu.jpg b/src/OEBPS/Images/Sigil_Plugins_Menu.jpg
index 4d59aba..92ed693 100644
Binary files a/src/OEBPS/Images/Sigil_Plugins_Menu.jpg and b/src/OEBPS/Images/Sigil_Plugins_Menu.jpg differ
diff --git a/src/OEBPS/Text/bookcontainer_py.xhtml b/src/OEBPS/Text/bookcontainer_py.xhtml
index d2026ef..e5d0471 100644
--- a/src/OEBPS/Text/bookcontainer_py.xhtml
+++ b/src/OEBPS/Text/bookcontainer_py.xhtml
@@ -83,7 +83,7 @@ class BookContainer(object):
             return 'en_US'
         return self._w.sigil_spellcheck_lang
 
-# OPF Acess and Manipulation Routines
+# OPF Access and Manipulation Routines
 
 # toc and pagemap access routines
 
@@ -163,17 +163,17 @@ class BookContainer(object):
 # metadata get/set
 
     def getmetadataxml(self):
-        # returns a utf-8 encoded metadata xml fragement
+        # returns a utf-8 encoded metadata xml fragment
         return self._w.getmetadataxml()
 
     def setmetadataxml(self, new_metadata):
-        # new_metadata must be a metadata xml fragmment
+        # new_metadata must be a metadata xml fragment
         self._w.setmetadataxml(new_metadata)
 
 # package tag get/set
 
     def getpackagetag(self):
-        # returns a utf-8 encoded metadata xml fragement
+        # returns a utf-8 encoded metadata xml fragment
         return self._w.getpackagetag()
 
     def setpackagetag(self, new_tag):
@@ -202,7 +202,7 @@ class BookContainer(object):
 
     # New for epub3
     def set_manifest_epub3_attributes(self, id, properties=None, fallback=None, overlay=None):
-        # sets the epub3 manifest attrobutes for this manifest id
+        # sets the epub3 manifest attributes for this manifest id
         self._w.set_manifest_epub3_attributes(id, properties, fallback, overlay)
 
 # reading / writing / adding / deleting other ebook files that DO NOT exist in the opf manifest
@@ -400,7 +400,7 @@ class BookContainer(object):
         return self._w.colorMode()
 
     # returns color as css or javascript hex color string #xxxxxx
-    # acccepts the following color roles in a case insensitive manner:
+    # accepts the following color roles in a case insensitive manner:
     #    "Window", "Base", "Text", "Highlight", "HighlightedText"
     def color(self, role):
         return self._w.color(role)
diff --git a/src/OEBPS/Text/inputcontainer_py.xhtml b/src/OEBPS/Text/inputcontainer_py.xhtml
index 817abce..830613e 100644
--- a/src/OEBPS/Text/inputcontainer_py.xhtml
+++ b/src/OEBPS/Text/inputcontainer_py.xhtml
@@ -98,7 +98,7 @@ class InputContainer(object):
         return self._w.colorMode()
 
     # returns color as css or javascript hex color string "#xxxxxx"
-    # acccepts the following color roles in a case insensitive manner:
+    # accepts the following color roles in a case insensitive manner:
     #    "Window", "Base", "Text", "Highlight", "HighlightedText"
     def color(self, role):
         return self._w.color(role)
diff --git a/src/OEBPS/Text/outputcontainer_py.xhtml b/src/OEBPS/Text/outputcontainer_py.xhtml
index 2a0f49a..a5d9a07 100644
--- a/src/OEBPS/Text/outputcontainer_py.xhtml
+++ b/src/OEBPS/Text/outputcontainer_py.xhtml
@@ -84,7 +84,7 @@ class OutputContainer(object):
         return self._w.sigil_spellcheck_lang
 
 
-# OPF Acess and Manipulation Routines
+# OPF Access and Manipulation Routines
 
 # toc and pagemap access routines
 
@@ -132,13 +132,13 @@ class OutputContainer(object):
 # metadata get/set
 
     def getmetadataxml(self):
-        # returns a utf-8 encoded metadata xml fragement
+        # returns a utf-8 encoded metadata xml fragment
         return self._w.getmetadataxml()
 
 # package tag get/set
 
     def getpackagetag(self):
-        # returns a utf-8 encoded metadata xml fragement
+        # returns a utf-8 encoded metadata xml fragment
         return self._w.getpackagetag()
 
 
@@ -327,7 +327,7 @@ class OutputContainer(object):
         return self._w.colorMode()
 
     # returns color as css or javascript hex color string "#xxxxxx"
-    # acccepts the following color roles in a case insensitive manner:
+    # accepts the following color roles in a case insensitive manner:
     #    "Window", "Base", "Text", "Highlight", "HighlightedText"
     def color(self, role):
         return self._w.color(role)
diff --git a/src/OEBPS/Text/plugin_py.xhtml b/src/OEBPS/Text/plugin_py.xhtml
index 7959e00..a3facf4 100644
--- a/src/OEBPS/Text/plugin_py.xhtml
+++ b/src/OEBPS/Text/plugin_py.xhtml
@@ -246,7 +246,7 @@ def run(bk):
 <head><title>testing & entities</title></head>
 <body>
   <p class="first second">this is the <i><b>copyright</i></b> symbol "©"</p>
-  <p xmlns:xlink="http://www.w3.org/xlink" class="second" xlink:href="http://www.google.com">this used to test atribute namespaces</p>
+  <p xmlns:xlink="http://www.w3.org/xlink" class="second" xlink:href="http://www.google.com">this used to test attribute namespaces</p>
 </body>
 </html>
 """
diff --git a/src/OEBPS/Text/quickparser_py.xhtml b/src/OEBPS/Text/quickparser_py.xhtml
index a5299c8..43bca76 100644
--- a/src/OEBPS/Text/quickparser_py.xhtml
+++ b/src/OEBPS/Text/quickparser_py.xhtml
@@ -126,7 +126,7 @@ class QuickXHTMLParser(object):
 
     # parses string version of tag to identify its name,
     # its type 'begin', 'end' or 'single',
-    # plus build a hashtable of its atributes
+    # plus build a hashtable of its attributes
     def parsetag(self, s):
         n = len(s)
         p = 1
diff --git a/src/OEBPS/Text/sigil_gumbo_bs4_adapter_py.xhtml b/src/OEBPS/Text/sigil_gumbo_bs4_adapter_py.xhtml
index 36d70f9..83064f1 100644
--- a/src/OEBPS/Text/sigil_gumbo_bs4_adapter_py.xhtml
+++ b/src/OEBPS/Text/sigil_gumbo_bs4_adapter_py.xhtml
@@ -177,7 +177,7 @@ def main():
 <head><title>testing ∓ entities</title></head>
 <body>
   <p class="first second">this is the <i><b>copyright</i></b> symbol "©"</p>
-  <p xmlns:xlink="http://www.w3.org/xlink" class="second" xlink:href="http://www.google.com">this used to test atribute namespaces</p>
+  <p xmlns:xlink="http://www.w3.org/xlink" class="second" xlink:href="http://www.google.com">this used to test attribute namespaces</p>
 </body>
 </html>
 """
diff --git a/src/OEBPS/Text/sigil_python_plugins.xhtml b/src/OEBPS/Text/sigil_python_plugins.xhtml
index d7e5491..cbffb44 100644
--- a/src/OEBPS/Text/sigil_python_plugins.xhtml
+++ b/src/OEBPS/Text/sigil_python_plugins.xhtml
@@ -259,7 +259,7 @@ class BookContainer(object):
 
     <li><p>if provided the file will be given the media-type provided by the mime-string, and if not provided the file extension is used to set the appropriate media-type</p></li>
 
-    <li><p>to support epub3 manifests, properties, fallback, and media-overlay atributes can also be set.</p></li>
+    <li><p>to support epub3 manifests, properties, fallback, and media-overlay attributes can also be set.</p></li>
   </ul>
 
   <p></p>
diff --git a/src/OEBPS/Text/validationcontainer_py.xhtml b/src/OEBPS/Text/validationcontainer_py.xhtml
index 999ec1f..681f8db 100644
--- a/src/OEBPS/Text/validationcontainer_py.xhtml
+++ b/src/OEBPS/Text/validationcontainer_py.xhtml
@@ -8,7 +8,7 @@
 </head>
 
 <body>
-  <h1>The Validation Container Class</h1>
+  <h1>The ValidationContainer Class</h1>
 
   <pre>#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
@@ -67,7 +67,7 @@ class ValidationContainer(OutputContainer):
         self.results.append(ValidationResult(restype, bookpath, linenumber, charoffset, message))
 </pre>
 
- <h2>The Validation Result Class</h2>
+ <h2>The ValidationResult Class</h2>
 <pre>#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
diff --git a/src/OEBPS/nav.xhtml b/src/OEBPS/nav.xhtml
index 779b700..ab14e92 100644
--- a/src/OEBPS/nav.xhtml
+++ b/src/OEBPS/nav.xhtml
@@ -81,7 +81,7 @@
           <a href="Text/outputcontainer_py.xhtml">The OutputContainer Class</a>
         </li>
         <li>
-          <a href="Text/validationcontainer_py.xhtml">The Validation Container Class</a>
+          <a href="Text/validationcontainer_py.xhtml">The ValidationContainer Class</a>
         </li>
         <li>
           <a href="Text/quickparser_py.xhtml">The QuickXHTMLParser Class</a>