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138 SUSE Linux Enterprise Desktop 10 GNOME User Guide
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current window with Zoom . When Shrink Wrap is selected, the image window is resized to fit the
current image display exactly.
10.4 Saving Images
No image function is as important as File > Save . It is better to save too often than too rarely. Use
File > Save as to save the image with a new filename. It is a good idea to save image stages under
different names or make backups in another directory so you can easily restore a previous state.
When saving for the first time or using Save as , a dialog opens in which to specify the filename and
type. Enter the filename in the field at the top. For Save in folder , select the directory in which to
save the file from a list of commonly used directories. To use a different directory or create a new
one, open
Browse for other folders . It is recommended to leave Select File Type set to By Extension .
With that setting, GIMP determines the file type based on the extension appended to the filename.
The following file types are frequently useful:
XCF
This is the native format of the application. It saves all layer and path information along with
the image itself. Even if you need an image in another format, it is usually a good idea to save a
copy as XCF to simplify future modifications.
PAT
This is the format used for GIMP patterns. Saving an image in this format enables using the
image as a fill pattern in GIMP.
JPG
JPG or JPEG is a common format for photographs and Web page graphics without
transparency. Its compression method enables reduction of file sizes, but information is lost
when compressing. It may be a good idea to use the preview option when adjusting the
compression level. Levels of 85% to 75% often result in an acceptable image quality with
reasonable compression. Saving a backup in a lossless format, like XCF, is also recommended.
If editing an image, save only the finished image as JPG. Repeatedly loading a JPG then saving
can quickly result in poor image quality.
GIF
Although very popular in the past for graphics with transparency, GIF is less often used now
because of license issues. GIF is also used for animated images. The format can only save
indexed images. The file size can often be quite small if only a few colors are used.
PNG
With its support for transparency, lossless compression, free availability, and increasing
browser support, PNG is replacing GIF as the preferred format for Web graphics with
transparency. An added advantage is that PNG offers partial transparency, which is not offered
by GIF. This enables smoother transitions from colored areas to transparent areas
(
antialiasing ).
To save the image in the chosen format, press Save . To abort, press Cancel . If the image has features
that cannot be saved in the chosen format, a dialog appears with choices for resolving the situation.
Choosing
Export , if offered, normally gives the desired results. A window then opens with the
options of the format. Reasonable default values are provided.