Change doc-view-mode-map prefix key 's' to 'c'.

* doc/emacs/misc.texi (DocView Slicing): Change prefix key 's' to 'c'.

* lisp/doc-view.el (doc-view-mode-map): Change prefix key 's' to 'c'.

* lisp/image-mode.el (image-mode-map): Add image-transform-set-scale to menu.

* doc/emacs/files.texi (Image Mode): Describe commands
image-transform-fit-both, image-transform-set-scale, image-transform-reset.

* etc/NEWS: Rearrange image sections.

https://lists.gnu.org/archive/html/emacs-devel/2020-04/msg01315.html

2 files changed, 17 insertions, 7 deletions

diff --git a/doc/emacs/files.texi b/doc/emacs/files.texi
index 7318667403f..56ce7fdea19 100644
--- a/doc/emacs/files.texi
+++ b/doc/emacs/files.texi
@@ -2113,8 +2113,6 @@ point.  Partial Completion mode offers other features extending
 
 @findex image-mode
 @findex image-toggle-display
-@findex image-next-file
-@findex image-previous-file
 @cindex images, viewing
   Visiting image files automatically selects Image mode.  In this
 major mode, you can type @kbd{C-c C-c} (@code{image-toggle-display})
@@ -2136,6 +2134,19 @@ window, so this is only necessary if you customize the default
 behavior by using the options @code{image-auto-resize} and
 @code{image-auto-resize-on-window-resize}.
 
+@findex image-transform-fit-both
+@findex image-transform-set-scale
+@findex image-transform-reset
+To resize the image manually you can use the command
+@code{image-transform-fit-both} bound to @kbd{s b}
+that fits the image to both the window height and width.
+To scale the image specifying a scale factor, use the command
+@code{image-transform-set-scale} bound to @kbd{s s}.
+To reset all transformations to the initial state, use
+@code{image-transform-reset} bound to @kbd{s 0}.
+
+@findex image-next-file
+@findex image-previous-file
 You can press @kbd{n} (@code{image-next-file}) and @kbd{p}
 (@code{image-previous-file}) to visit the next image file and the
 previous image file in the same directory, respectively.
@@ -2204,7 +2215,6 @@ can be used to transform the image in question to @acronym{PNG} before
 displaying.  GraphicsMagick, ImageMagick and @command{ffmpeg} are
 currently supported for image conversions.
 
-
 @findex thumbs-mode
 @cindex mode, Thumbs
   The Image-Dired package can also be used to view images as
diff --git a/doc/emacs/misc.texi b/doc/emacs/misc.texi
index dceb8d3ca5b..47f195d0b20 100644
--- a/doc/emacs/misc.texi
+++ b/doc/emacs/misc.texi
@@ -617,12 +617,12 @@ of pages to display.  A slice is a rectangle within the page area;
 once you specify a slice in DocView, it applies to whichever page you
 look at.
 
-  To specify the slice numerically, type @kbd{s s}
+  To specify the slice numerically, type @kbd{c s}
 (@code{doc-view-set-slice}); then enter the top left pixel position
 and the slice's width and height.
 @c ??? how does this work?
 
-  A more convenient graphical way to specify the slice is with @kbd{s
+  A more convenient graphical way to specify the slice is with @kbd{c
 m} (@code{doc-view-set-slice-using-mouse}), where you use the mouse to
 select the slice.  Simply press and hold the left mouse button at the
 upper-left corner of the region you want to have in the slice, then
@@ -631,10 +631,10 @@ button.
 
   The most convenient way is to set the optimal slice by using
 BoundingBox information automatically determined from the document by
-typing @kbd{s b} (@code{doc-view-set-slice-from-bounding-box}).
+typing @kbd{c b} (@code{doc-view-set-slice-from-bounding-box}).
 
 @findex doc-view-reset-slice
-  To cancel the selected slice, type @kbd{s r}
+  To cancel the selected slice, type @kbd{c r}
 (@code{doc-view-reset-slice}).  Then DocView shows the entire page
 including its entire margins.