In this section, we introduce some convenient facilities for finding recently-opened files, reading file names from a buffer, and viewing image files.
If you enable Recentf mode, with M-x recentf-mode, the
‘File’ menu includes a submenu containing a list of recently
opened files. M-x recentf-save-list saves the current
recent-file-list to a file, and M-x recentf-edit-list
The M-x ffap command generalizes
find-file with more
powerful heuristic defaults (see FFAP), often based on the text at
point. Partial Completion mode offers other features extending
find-file, which can be used with
See Completion Options.
Visiting image files automatically selects Image mode. In this
major mode, you can type C-c C-c (
to toggle between displaying the file as an image in the Emacs buffer,
and displaying its underlying text (or raw byte) representation.
Displaying the file as an image works only if Emacs is compiled with
support for displaying such images. If the displayed image is wider
or taller than the frame, the usual point motion keys (C-f,
C-p, and so forth) cause different parts of the image to be
displayed. You can press n (
image-next-file) and p
image-previous-file) to visit the next image file and the
previous image file in the same directory, respectively.
If the image can be animated, the command RET
image-toggle-animation) starts or stops the animation.
Animation plays once, unless the option image-animate-loop is
nil. With f (
image-next-frame) and b
image-previous-frame) you can step through the individual
frames. Both commands accept a numeric prefix to step through several
frames at once. You can go to a specific frame with F
image-goto-frame). Frames are indexed from 1. Typing a
image-increase-speed) increases the speed of the animation,
a - (
image-decrease-speed) decreases it, and a r
image-reverse-speed) reverses it. The command a 0
image-reset-speed) resets the speed to the original value.
If Emacs was compiled with support for the ImageMagick library, it
can use ImageMagick to render a wide variety of images. The variable
imagemagick-enabled-types lists the image types that Emacs may
render using ImageMagick; each element in the list should be an
internal ImageMagick name for an image type, as a symbol or an
equivalent string (e.g.,
BMP for .bmp images). To
enable ImageMagick for all possible image types, change
imagemagick-enabled-types to t. The variable
imagemagick-types-inhibit lists the image types which should
never be rendered using ImageMagick, regardless of the value of
imagemagick-enabled-types (the default list includes types like
HTML, which ImageMagick can render as an image
but Emacs should not). To disable ImageMagick entirely, change
imagemagick-types-inhibit to t.
The Image-Dired package can also be used to view images as thumbnails. See Image-Dired.