How do you change a picture’s transparency on microsoft word 2007?

We’ve tried looking in any tab, and can’t find Almost anything to change some sort of picture’s transparency.How can you make that semi-see-through
Thanks.

Microsoft has an article on that:

http://office.’microsoft’.com/en-us/word-help/change-the-brightness-contrast-or-transparency-of-a-picture-HA010198873.aspx.