So now we've got our blue tint, we've got all of our areas masked and colored, and we're ready to submit, right? Wrong. Here's where we are now:The first thing to notice is that all this colorizing has thrown our dark levels off. The image is much brighter than it was when we started. To fix that, we're going to add an Adjustment Layer for Levels. Like Masks, Adjustment Layers affect the appearance of layers, but don't change the content. That means that anything you do can be immediately undone without any loss to your original source material. By raising the dark levels, we get a much sharper and cleaner image, almost as clean as our original source: It's good, but there's still one more thing we can do to it go make it better.