[Mike V. Florida]

Assumptions on my part,

The scan is a jpeg.
You are trying to put in into a word document.

After placing it into the document, I would think you need to click on it to select it then right click on it to open options the select in front of text and then click a corner of the picture to resize it to the margins selected for the page.

With that said I no longer use word and this is from memory. Hope it helps.