Why is the size different? (A4 problem)

When I create an A4 sized canvas in Photoshop, the actual size (100%) is about three times bigger! - Even when I manually enter the measurments in 'mm', when viewed in 100%, it's still much too large!
Extremely frustrating, would greatly appreciate help,
Thanks.

You appear to be lost.
The Photoshop forums are here:
http://forums.adobe.com/community/photoshop
To answer your question:
Photoshop is image editing software, and the size is displayed in pixels irrespective of the ppi you define for your image.
Harbs

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