One Quickie

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Manually creating a binding (Bindings->General)

[imageView bind: @"valuePath"
           toObject: imagesController
           withKeyPath: @"selection.fullPath"
           options: nil];

In Interface Builder, "Bind To" corresponds to imagesController, "Controller Key" would be selection, and "Model Key Path would be fullPath.

Use

    [imageView unbind: @"valuePath"];

to remove a binding.