MacMaster77

That's good to know since PSD has a maximum size of 2GB. Thanks for your input.

I'm still hoping that one of the staff can help me with this. Thanks!

I've looked over the forum for the answer to this so I apologize if it has already been answered. I'm a large format film photographer. I scan my black and white negatives at 2400DPI, at 16bit grayscale. These usually come out of the scanner at about 1GB. By the time I'm done with some adjustments, they are 3-4GB a piece (yes I make very large prints). I found out the hard way, that a PSD file is only good for 2GB and a TIFF file will allow 4GB. I was wondering if the TIFF limit is the same with AP and what the native AP file format allows. Thanks... Spencer