If you mean, can you place a photo anywhere on the page you want it, I don't think that's possible. Someone else can correct me if I'm wrong.
If you click on your thumbnail photo, it will take you to the photo edit page. Scroll down until you get to the "Photo Edit Info" section. To the right of that, you'll see "Changes."
From the changes section, you can mark the photo to be included to the right of the biography section on the profile page. It won't be a thumbnail size (unless, perhaps, the photo you uploaded is a thumbnail size.) You can also turn the photo into a background. Photos, documents, and backgrounds of your choosing can be managed under the "Changes" section. They will all be displayed in a column on the right hand side of the Biography section of your main profile page.
I'll give you an example of one of the profiles I created: http://www.wikitree.com/wiki/Barton-1093
Set as Primary Photo
To make this the "thumbnail" image that appears at the top of a profile and on family trees select the checkbox next to a name and click the button below. (You can remove a primary photo in the same way, i.e. by unchecking the box and clicking the button.)
Set as Background Image
To make this the background image for a profile select a name and click the button below.
Below "Andrew Jonathan Barton" links, there are "Save" buttons that didn't show up in this example.
Hope this helps.