diff --git a/manual/gui.rst b/manual/gui.rst
index 3ee6e742b9..f3d82576fa 100644
--- a/manual/gui.rst
+++ b/manual/gui.rst
@@ -956,7 +956,7 @@ calibre has several keyboard shortcuts to save you time and mouse movement. Thes
- Restrict the displayed books to only those books that are in a category
currently displayed in the :guilabel:`Tag browser`
* - :kbd:`B`
- - Browse annotations (highlights and bookmarks) made in the calibre viewer for all books in the library
+ - Browse annotations (highlights and bookmarks) made in the calibre E-book viewer for all books in the library
* - :kbd:`Ctrl+Shift+N`
- Browse notes associated with authors/series/tags/etc.
* - :kbd:`Alt+Shift+L`
diff --git a/manual/typesetting_math.rst b/manual/typesetting_math.rst
index 644fb9f3e8..cd435c244b 100644
--- a/manual/typesetting_math.rst
+++ b/manual/typesetting_math.rst
@@ -56,7 +56,7 @@ with an e-book you can distribute easily to other people.
.. literalinclude:: mathjax.html
:language: html
-.. note:: The calibre viewer supports MathML as well as TeX, but you must
+.. note:: The calibre E-book viewer supports MathML as well as TeX, but you must
include the ```` line in
your HTML file otherwise the MathML will not render.
diff --git a/manual/viewer.rst b/manual/viewer.rst
index c49e3cd947..4284c73c12 100644
--- a/manual/viewer.rst
+++ b/manual/viewer.rst
@@ -275,7 +275,7 @@ The viewer has extensive keyboard shortcuts, like the rest of calibre. They can
be customised in the viewer :guilabel:`Preferences`. The default shortcuts are listed below:
-.. list-table:: Keyboard shortcuts for the calibre viewer
+.. list-table:: Keyboard shortcuts for the calibre E-book viewer
:widths: 10 100
:header-rows: 1
@@ -419,10 +419,10 @@ viewer preferences to force the viewer to break up lines of text in
code, pre { white-space: pre-wrap }
-Designing your book to work well with the calibre viewer
-------------------------------------------------------------
+Designing your book to work well with the calibre E-book viewer
+-----------------------------------------------------------------
-The calibre viewer will set the ``is-calibre-viewer`` class on the root
+The calibre E-book viewer will set the ``is-calibre-viewer`` class on the root
element. So you can write CSS rules that apply only for it. Additionally,
the viewer will set the following classes on the ``body`` element:
@@ -443,7 +443,7 @@ the viewer will set the following classes on the ``body`` element:
Finally, you can use the calibre color scheme colors via `CSS variables
`_.
-The calibre viewer defines the following variables:
+The calibre E-book viewer defines the following variables:
``--calibre-viewer-background-color``, ``--calibre-viewer-foreground-color``
and optionally ``--calibre-viewer-link-color`` in color themes that define
a link color.