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Measuring by pixels

73rdpixel
Registered: Dec 11 2008
Posts: 2

I find the measuring tool potentially really helpful for people who needs to document heights and widths for web developers. Problem is that there doesn't seem to be a way to measure it in pixels. Anybody know a way to set this up?

michaelejahn
Registered: Apr 26 2006
Posts: 232
I will assume that you realize that PDF files often contain vector objects which do not have "pixels" - and this is why when you zoom in at 6400% type and objects look crisp - also - if you had a 300 ppi image, displaying at 100% - measuring by pixels makes no sense anyway, as the way Acrobat displays the image is dependent on several factors.

- your computer screen resolution and what you have as a setting In Acrobat, Under the EDIT menu, select PREFERENCES, click over PAGE DISPLAY - see what you have selected with RESOLUTION - in Acrobat 9 for exaple, the default is some really weird 110 pixels to the inch - Mac people tend to use the "PostScript" like 72 pixels to the inch, Wintel users tend to use 96 pixels to the inch - so, again, as PDF files - and Acrobat - are 'resolution independent - i am not sure what you are interested in actually doing here.

if you are asking "i just want to know how big something is" - set view to 100% and (depending on how your screen is set up, and inch should equal and inch - if it does not, get a ruler, hold it to the screen and adjust acrobat (as described above)

If you are saying "hey, I have a PDF file and i want to save part of it as a JPEG file...at a specifc size, and I think in pixels, not inches" - again, once you have Acrobat resolution set up the way you like --

Follow these simple steps.

To copy the whole page

1 Navigate to a page
2. Under Edit, select copy file to clipboard
3. Paste into Paint (windows) or Preview (Macintosh)

for part of a page

1. Zoom the page to the size you need
2. In Acrobat - Under the Tools Menu, Select "SELECT & ZOOM" then cascade select "SNAPSHOT TOOL"
-- (this works with Reader as well as Acrobat Standard or Pro)
3. Click and drag over the area you want (this copies that to the clipboard)
4. Paste into Paint (windows) or Preview (Macintosh)

Of course, you can "save as" any page (or all pages) to JPEG and crop away (in something like Image Ready or Photoshop)

And, you can always scale to the size you need from there

Hope this helps.

Michael Jahn
Application Support Specialist
Compose Systems Inc, USA.
4740 Northgate Blvd. Suite 100
Sacramento, CA 95834
Tel: (916) 920-3838 ext 102
Fax: (916) 923-6776
Email: michaelejahn [at] composeusa [dot] com
Web: www.composeusa.com