How to register the workstation's pixel dimmensions?

Discussion in 'Photoshop Tutorials' started by iceberg, Dec 17, 2004.

  1. iceberg

    iceberg Guest

    Does anyone know how/where am I meant to register my monitor's pixel
    dimmensions to support the render-sized preview (i.e. "Print Size")?

    The advertised "Print Size" preview feature is very important to me as
    it (potentially) avoids a lot of surprises and wasted time. However,
    despite extensive searching I have not yet discovered anywhere to
    register my monitor's (non-square) pixel dimensions.

    I am currently working around this by setting the Screen Resolution in
    the Units & Rulers / New Document dialogue (!) to the nearest
    approximate size (96 ppi as it happens) and then jamming my display's H
    & V controls hard over to force it to produce exactly 96 square pixels
    / inch! This is very unsatisfactory abuse of the monitor.
    P.S. Anyone from adobe lurking here?
    iceberg, Dec 17, 2004
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  2. iceberg

    otto Guest

    P.S. Logically the monitor's resolution should presumably be grouped
    with its colour profile but I couldn't see where Adobe picks these up
    from either.
    otto, Dec 17, 2004
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  3. iceberg

    cb Guest

    Even with square-pixel monitors, View>Print View is not accurate.
    (Photoshop does not know your monitor's resolution setting.) But in
    your case (using a monitor with non-square pixels) maybe try going
    Image>Pixel aspect Ratio and adjust the pixel ratio for that image.
    Then modify your monitor's resolution and tweak Y and H geometry to
    get close to your print size.
    cb, Dec 17, 2004
  4. iceberg

    cb Guest

    The feature allowing adjustment of the Pixel Aspect Ratio is only in
    Photoshop CS (8.0), not earlier versions.
    cb, Dec 17, 2004
  5. iceberg

    otto Guest

    To adobe: Why is it not accurate? It is a totally trivial matter to
    calibrate the physical resolution of any monitor- e.g. on the back of
    the color profiling.

    I don't have CS 8 to investigate - but it sounds very much like this is
    just another work around. I definitely do not wish to "fudge" my
    products nominal aspect ratio as this could cause big trouble
    downstream (the printer might comply!).

    So, before I spend any more time or money on Adobe products - are we
    saying that as yet PS doesn't even have the most basic device modelling
    otto, Dec 17, 2004
  6. iceberg

    cb Guest

    Have you posted this on the Adobe Photoshop Forum at At
    least one Adobe Engineer participates regularly, and he (among others)
    may be more able to address your concerns.
    cb, Dec 17, 2004
  7. iceberg

    WharfRat Guest

    File > New
    Set width to 1 inch and resolution to 72 ppi
    Show rulers
    Hold your ruler to the screen
    and adjust the percentage setting in the lower left
    until the onscreen ruler matches your real one.
    (Say you end up with 173%)
    Multiply your percentage by 72
    -- That is the resolution of your screen.
    Double check it -
    New document 1 inch wide at resolution of 124.56
    Select Actual pixels
    If it is not correct - do it again.
    Go to Photoshop>Preferences>Units and Rulers
    Set the screen resolution to what you figured out
    Open an Image and choose Print Size
    Measure it ...
    and ...
    it is still incorrect
    click on the zoom tool in the toolbox
    and click on the Print size button that appears in the options button.
    It is correct now.
    The Print size button in the "View" menu always assumes a 72ppi monitor.
    The Zoom Tools Option Bar uses the screen resolution set in Preferences.

    The Zoom Tools Print size is the one to use.

    "Photoshop User"
    WharfRat, Dec 18, 2004
  8. iceberg

    Philip Rose Guest

    WharfRat wrote:

    Nice to see enlightenment (for me, at least) on something that basic,
    after using Photoshop for 10 years! That's the "Tip of the Day" for me
    (and more than worth the price of admission). :)

    Philip Rose, Dec 19, 2004
  9. iceberg

    otto Guest

    Did I miss something? This appears to be the exact same workaround I
    have used - except it doesn't appear to address the non-square pixel
    issue at all.

    If this workaround is infact good enough for you, then I also

    1. Use a larger reference image (at least 10 x 10 cm) if accuracy

    2. If you have CRT monitor then you can avoid the "measure, calculate
    & re-enter" iteration by setting the "Screen resolution" property to
    the nominal resolution of your monitor (e.g. 96ppi) and using the
    monitor's analogue H&V controls and ruler to tweak the measured image
    size to agree with its nominal size (e.g. 10x10cm) .
    properties of the product image in order to preview it accurately!

    This particular fudge may be just about acceptable for print products,
    but how would I preview images for a very non-square pixel screen on a
    hi-res almost-square (by comparison) workstation screen?

    My concern (prior to making large investment in an e2e production path)
    is that there does not appear to be any coherent, let alone explicit,
    model of the production and preview devices - This is an area that even
    a half-serious imageing product must MAJOR in.
    otto, Dec 20, 2004
  10. iceberg

    otto Guest

    P.s. Astonishing! - as WharfRat pointed out - the product isnt even
    consistent about its "Print preview" scaleing. This product is
    definitely a pup - I shan't waste any more time with it.
    otto, Dec 20, 2004
  11. iceberg

    cb Guest

    New features in Photoshop CS specifically address your problem working
    in a non-square pixel environment. Why do you insist on whining about
    Photoshop's shortfalls when Adobe has improved the program expressly
    to meet the needs of video and film graphic professionals working with
    rectangular pixels? I can see reason to bitch if Adobe kept ignoring
    the needs of Photoshop users. But, in this case, they have not. Upgrade
    cb, Dec 20, 2004
  12. iceberg

    otto Guest

    I insist on "whining" cos I require and was sold a product that would
    give me accurate previews within the limits of CRT device (color *and

    In any case, following your advice I have spent considerable resources
    upgrading to CS and looking for some place to register my monitor's
    pixel dimmensions - to no avail. So if you can back up your assertion
    with reference to the specific menu where the monitor's pixel
    dimmensions can be registered I would be very grateful.

    ( It is certainly true that you can set rectangular pixels on the
    images - however I still can not preview them accurately! )
    otto, Jan 5, 2005
  13. iceberg

    cb Guest

    Never said it could "register...monitor pixel dimension". (Re-read
    my posts.)

    PSCS allows you to manually adjust the Pixel Aspect Ratio, which, I
    hope, is your biggest problem. You had two issues: working on files
    with non-square pixels and wanting the actual print size to be
    displayed on your monitor. One of them is now solved:
    Go Image>Pixel Aspect Ratio and choose a default ratio setting or
    create your own.

    The idea of having a PS file show exactly "print size" on your
    monitor (and every other device the file is viewed on) is rife with
    problems. Use info from Image Size, Document Dimensions and/or Rulers
    to get exact print dimensions.
    cb, Jan 14, 2005
  14. iceberg

    cb Guest

    Once you have your pixel ratio adjusted, follow WharfRat's suggested
    method to get a very close to accurate View>Print Size on your monitor.
    cb, Jan 14, 2005
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