What you may not realize is that Word automatically resizes a large image to fit within the page margins of your document, no matter how big your image is. Unfortunately, large images can substantially increase your document’s file size. Sometimes we have to insert large images (such as photos, maps, and diagrams) into a Word document. In Word 2010, picture compression seems to be ‘on’ by default. Update November 2013: Most of this blog post’s contents apply to Word 2007.
