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lucillen46641511
lucillen46641511
Inspiring
January 18, 2017
Answered

CHANGE resolution to 300DPI

  • January 18, 2017
  • 5 replies
  • 4637 views

i want  to permanently change resolution to at least 300DPI. i know how to do it, just wondering if i can make it a default... i looked in preferences and cant find solution.  i know a lot of times certain settngs change back to a default and it drives me crazy, even  brushes do not stay i have to save them...

    This topic has been closed for replies.
    Correct answer JP Hess

    Digital images don't have a DPI  setting. All they have is pixel dimensions. Changing the DPI (Really, it's PPI or pixels per inch) setting has no impact whatsoever on image quality in Photoshop. The only time it comes in to play is when you are trying to set up a print job. And then the setting is relative to the printer. It has no impact on image display on your monitor.

    5 replies

    Stephen Marsh
    Community Expert
    Stephen MarshCommunity Expert
    Community Expert
    January 19, 2017

    When opening raw camera files through Adobe Camera Raw, one can also set the PPI value in the “workflow” text at the bottom centre of the ACR interface (click on the hypertext):

    As previously mentioned, the PPI value is stored in metadata. If you wish to change this value on saved images it could be performed using an batch action or image processor script+action to resize to 300ppi with resampling turned off – however I would not recommend doing this for JPEG files as it will decompress/recompress them which is not best practice for a lossy compressed file (even  if the quality loss is next to invisible). I would use ExifTool to batch update the PPI metadata in the files without affecting the actual image data.

    More here:

    Bridge thumbnails not showing correct resolution

    P.S. For images, it is PPI or pixels per inch, not DPI or dots per inch.

    gener7
    Community Expert
    gener7Community Expert
    Community Expert
    January 18, 2017

    300 ppi is stored as Metadata,  which is information about the file separate from the image.

    PSD and Tiff will always carry the 300 ppi, but using Save for Web on Jpeg and PNG can remove that 300 ppi if Metadata is set to "None". The file then defaults to 72 ppi.

    So if you save those kinds of files, you either have to set Metadata to "All" in Save for Web, or use File > Save As... to create a jpeg or png file with the 300 ppi metadata.

    davescm
    Community Expert
    davescmCommunity Expert
    Community Expert
    January 18, 2017

    Hi

    Preferences - Units & Rulers

    Dave

    lucillen46641511
    lucillen46641511Author
    Inspiring
    January 18, 2017

    do i have to restart PS in order for change to kick in, because i changed it and it still comes up with 72DPI

    JP Hess
    JP HessCorrect answer
    Inspiring
    January 18, 2017

    Digital images don't have a DPI  setting. All they have is pixel dimensions. Changing the DPI (Really, it's PPI or pixels per inch) setting has no impact whatsoever on image quality in Photoshop. The only time it comes in to play is when you are trying to set up a print job. And then the setting is relative to the printer. It has no impact on image display on your monitor.

    jbm007
    Community Expert
    jbm007Community Expert
    Community Expert
    January 18, 2017

    Change what PS?

    PS uses UI scaling

    Your operating system determines DPI settings

    lucillen46641511
    lucillen46641511Author
    Inspiring
    January 18, 2017

    ok, then is that changeable? the interface?

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