I'm new to mac and one thing I don't like is when a open a file in finder like an image , it opens the image but then it closes finder? This is very annoying. how to I prevent this? also, in windows when I want to cycle through all folders that start with the letter "d" I just highlight a folder and keep pressing "d" on my keyboard.How do I achieve the same affect in Mac? In mac if I keep pressing "d" it looks for files/folders that start with d then "dd" and if I press it again "ddd". ?