Photoshop/photoshopcs3/autoblend

=> Photoshop Tutorials => New Features In Photoshop Cs3 => Auto Blend Layers

Auto Blend Layers

1- Select the layers that you want to blend (use Ctrl+click, Shift+click or use the link option)

2- Go to Edit>> Auto Blend Layers, you will see that there are no dots ... after this option which means no dialog box will popup. And that's all for layer auto blend

This option is mostly used after you align layers to overlap.