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Question regarding scanned images in texts

  1. May 14, 2014 #1
    Some time ago I posted the following:

    "Can someone give me an idea of how to include (the scan of) a small diagram - say 1/4 to 1/3 of the size of an A4 page (thus not the whole page) - into a post - in such a way as the diagram is visible to the reader - that is he/she does not have to open a pdf file.

    Peter "

    I got some helpful answers and began to use the Irfan image editor.

    But now I am at a different location and only have access to a Mac.

    All I want to do is select a small portion of an A4 pdf and post the selected text as a PNG file in a post - but (really strangely given Mac's reputation) I cannot find software for this simple task.

    Can anyone suggest software and a process to do the above.

    Hope someone can help.

  2. jcsd
  3. May 15, 2014 #2


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    Staff: Mentor

    Mac OS comes with a Grab utility that you can use to capture a selection from the screen and save it as a TIFF file. Then you can use the Preview utility to convert it to a PNG.

    1. Open the PDF file and display the page that you want to capture the image from.

    2. Find Grab in the Applications --> Utilities folder, and launch it.

    3. From the Capture menu, choose Selection.

    4. Drag the mouse over the section of the screen that you want to capture. A window will appear with an image of your selection.

    5. From the File menu, choose Save, which saves the image as a TIFF file, in a location you can choose.

    6. Quit from Grab.

    7. In the Finder, double-click the TIFF file. It should open up in the Mac OS Preview application.

    8. From the File menu, choose Export. In the Format dropdown menu, you can choose PNG.
  4. May 15, 2014 #3
    Thank you ... Really appreciate your help ...

  5. May 15, 2014 #4

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Use the Help Center!


    The above instructions will drop a file on your desktop labeled "Screen Shot <date> at <time>". That might be good enough. Then again, it might be a bit big. To change the size of the image, open it with Preview, click on Tools and select "Adjust Size ...". Now adjust the size.

    Attached Files:

  6. May 15, 2014 #5
    Thank you ... That is most helpful advice ... Peter
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