Is there any way to add a border around just one object?

[akrobeau]

For example, if I had a circle, is there a way to add a circle border around just that object?

[floramc]

I don't think this is something you can do in Photoshop Mix, much likely you have to export to Ps desktop for this kind of finishing.

I looked through the app and could not find a way to draw these lines