How do you view a upload in a page view (portal page) as a thumbnail? Example - HR uploads a picture of the employee and wants it to be on there profile page.
Rollbase does not provide special support for thumbnails. You can, however, upload 2 images per object: large and small. Or modify image's size in IMG HTML tag (use image's URL in template field).
Ok is there way to display that image in a view/portal page?
Sure, just create an Image field and use that field as a column in a View shown in your portal.