Saving Files & the "Unexpected End-of-File" error:
Photoshop may not reliably recognize the quota limits on
user accounts and may try to save a document even if there
is not enough room in the account to store the entire file.
The user does not receive an error message at the time of saving,
but only part of the file is stored in the user's account.
This problem can result in an "unexpected
end-of-file" error when the file is reopened. Because only part
of the file was successfully saved, the file cannot be recovered.
Users working in Photoshop who are near their quota storage limits
or are working with very large files should save backup copies of
their work in a folder with their name on it on the Temporary_Storage
volumes of the computers. If the user happens to hit her or
her limit while saving, a backup copy of the file will still be properly
saved. Users who are interested in raising their quota limit should
speak to a consultant.
Printing - Preparing the Document:
For the fastest print times, we recommend flattening documents
and setting their resolution to a value of 150 dpi or lower.
Please remember to save your document
before completing the following steps. Flattening a document's
layers and/or adjusting its resolution can result in the loss
of digital image information.
This is ok for printing, but may be undesireable if you intend
to continue working with the image in the future.
- To flatten a document, choose "Flatten
Image" from the Layers menu. This will compress all layers
into the background layer. Do not save your document after
flattening if you want to continue working with layers.
- To check or adjust your resolution, choose "Image
size" from the Image menu. In the Image
Size dialog box make sure that your resolution is set to
200 pixels/inch or lower.
Printing - Choosing an Encoding Method:
Recent upgrades allow the lab printers to handle most print
jobs and encoding methods without a problem. This means that fewer
print settings need to be checked or changed before sending jobs
from Adobe Applications.
If, however, documents you are trying to print
are coming out as pages of gibberish or are being
flushed before they are printed, you may want to try a different
encoding method. Select Print from the File menu. From the menu in
the upper right corner of the Print window, select Output, then look
for the Encoding menu below it. The Encoding method should be set
to ASCII85 (see
example).
Once you have sent your print job, be patient.
Printing from Photoshop can take several minutes, especially if your
document is large.
For more information about printing or obtaining refunds,
please read How to Achieve Perfect Printing.
If you have a problem or with printing, please ask for help from
the
consultant on duty. Do not send your print job more than
once, as doing so may only complicate the problem and create
a longer delay for you and other users of the lab.
Scanning and image resolution:
We recommend scanning documents by opening Photoshop and selecting
Import from the File menu. Select the brand of scanner you are using
from the pop-out menu beside the Import command. Our flatbed scanners
are made by Epson and our slide/negative scanners are made by Nikon.
The resolution of an image describes the number
of blocks of color per inch of the graphic. Resolution is typically
measured in pixels-per-inch (ppi) for image data or dots-per-inch
(dpi) for printers and monitors. Images with low resolution may be
blurry or indistinct, while images with high resolution will be clearer
and more crisp. Image resolution is also associated with the file
size of the image; higher resolution files take up more room on your
disk or in your account.
When you scan, keep in mind the size of the original
image in relation to the final image. For instance, if you are scanning
a very small object and you want to enlarge it, you should scan it
at a high resolution. If you will be scanning a large object and
reducing it, you can scan at a lower resolution. For the average
user, working with images scanned and manipulated at 300ppi and reduced
to 200ppi to print should be sufficient. If you are a graphic design
artist or if you are doing a great deal of image manipulation, you
may want to work at a higher resolution.
As you edit your work, save your image as a Photoshop
file (.psd). This file type will preserve your resolution, layers,
and all other Photoshop information. When you are finished, you can
export your file as a JPEG, GIF, TIFF, bitmap, or other file type.
These file types will compress your image to shrink the file size,
but you will also lose your layers and some image quality. If you
plan to continue editing the original image, save one copy as a .psd
file and other copies as compressed file types. For more information
about the various file types and what they are used for, read the "Saving
and Exporting Images" chapter of the Photoshop help manual,
available from the Help menu in the Photoshop application.
The standard resolution for images on the internet
is 72 ppi. The standard file types used on the internet are GIFs,
JPEGs, and TIFFs.You can use Photoshop's Save for Web option under
the File menu to optimize your images for the internet.
The black and
white lab printers print at 2400x600 dpi and the color printers
print at 1200x1200 dpi. Printing at 200ppi is about the maximum
resolution necessary to get a good print. (Keep in mind ppi and dpi
are not the same thing. See this
chart for more info.) A full page of graphics
may take several minutes to print.
If you experience a software issue that is not reflected
on this page or have a question about this software, please report
it to the consultant at the helpdesk.
