In Photoshop CS4, when you drag an image to open it, the program opened in a new tab automatically. Since version CS5, in doing so, the software simply inserts the image on the tab that is already open. There configuring Photoshop CS6 equal to CS4 (when dragging an image, open it in a new tab)?
Drag the image to the border of Photoshop, not the working area.
When you drag an image into the working area it assumes you want to place the image on top of the document that's already there.
Thank you for the help!! It's works!
If that answered your question, you might want to take a look at this article: http://forums.adobe.com/thread/1058744?tstart=0 and mark Noel's Reply as Correct, and the thread as Answered.