Wed 04-Jul-12 12:04 AM | edited Wed 04-Jul-12 12:44 AM by Leonard62
You didn't mess up. The way to get HDR is to bracket successive exposures and then combine them in software. Photoshop CS5 has a setting to do this and it's pretty good. There is other software for HDR as well. The D3200 doesn't have a bracketing setting so you would need to take successive exposures using normal, under and over exposure shots while keeping the camera very still on a tripod.
The D5100 has a HDR mode where it takes two different exposures with one press of the shutter release and then combines the two in camera. The D3200 can't do that.
The D4 also has an in camera HDR setting using two exposures. As far as I know only the D4 and D5100 Nikon cameras have an in camera HDR function.
The image overlay function in the retouch menu in the D3200 is a way to combine two photos into one, in camera. It is different then HDR. I have used this feature to combine two different photos into one. You can overlay any two photos on the memory card in camera. The photos must be raw however. It's pretty good.