Photoshop File Formats
Digital images comprise millions of pixels. The different
ways they are calibrated and stored are known as file formats. If Save As is
selected, a drop-down menu containing 17 different formats to choose from is
presented. Many of these formats are only used in design or reproduction.
TIFF (Tagged Image
File Format)
This is a standard format allowing images to be viewed,
changed, and saved in most imaging software programs. A “profile” is attached
which holds the digital information required for accurate printing and enables
the image, size, colors, and contrast to be recognized on another computer.
When saving as a TIFF, a box opens asking which compression is required.
Usually, None is selected. However, for e-mailing TIFFs, you can use ZIP or LZW
formats that reserve the quality.
JPEG (Joint
Photographic Experts Group)
JPEGs are compressed files that remove pixels to reduce
the file size, making them quicker to send as e-mail attachments. The reduction
in quality will be noticeable, though selecting Save for Web from the File Menu
will produce files of excellent quality. Digital camera record files as JPEGs,
that can converted to and saved later as TIFFs.
Photoshop (PSD)
A Photoshop document is similar to a TIFF and is the
default setting in Photoshop when images are saved. These documents can also be
opened in other computers, and any open layers will be kept intact, which is
not possible with a TIFF.
RAW
Some digital cameras can shoot in the RAW format, which
doesn’t remove any pixels and so does not compress the file. The files will be
larger than JPEGs and require careful processing to get the best quality. Raw
is the favored format for professionals, giving them total control over the
digital processing in the same way that making a high quality photographic
print in a conventional darkroom gets the best out of a negative. Image can be
saved as Photoshop RAW, but this is only really necessary if you do not know
which format the image may be opened in other computer.
File Menu
The File menu contains many important commands for
opening and saving files as well as printing images and preparing photographs
for use online. It also includes several other exciting features, such as
creating web pages, browsing with Adobe Bridge, and making contact sheets.
Opening an Image
To open any image that recognizes by Photoshop, select
Open or (Ctrl/Command O) The last 10 files saved in Photoshop can be found
under Open Recent.
Saving an Image
Selecting Save from the File menu (Ctrl_S) will save any
changes made to file, updating it from the previous saved version. If you
prefer to leave the original file intact, however, and create a new file with
any manipulation and changes, then select Save As. Then assign a new file name
to store it on your computer.
File Info
Before digital photography, when only prints could be
sent to clients, magazines or any, it was sensible to attach a label to the
back with details such as title, name of photographer, return address, and a
copyright notice. With the presence of digital files, this is found under file
info.
Browse
Photoshop had a very useful File Browser that was used to
look at the contents of different folders of photographs. This command has now
a separate program, Adobe Bridge, can be use to browse image.
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