PP, as "post process." The same as developing the RAW image using Elements. Just before opening the RAW image, Elements presents me with a smaller version of the unprocessed photo, and several options relating to how I want the photo to look when I open it. One of the options is a slider for increasing or decreasing the clarity of the photo. If I increase clarity, the photo looks sharp, but if I decrease clarity, the photo is turned softer and softer depending on how far I move the slider on the negative scale. A similar result can be achieved after the photo is opened by using the Gaussian Blur filter slider (Filter menu~Blur~Gaussian Blur), except that while "not or reduced clarity" soften the whole image regardless of depth-of-field, Gaussian Blur sort of woks the depth-of-field. If a portion of the image is in greater focus than the rest, then it takes more blur to soften that portion of the image.