It's shrinking ever so slightly in accordance with the Expose command. If your window was smaller, you'd notice the free space around the window darken, too.
Thank you guys. I know all about expose function. I just wonder why it will be fuzzy if there is only one window. I can't understand why the slightly shrinking will make that.
Thank you guys. I know all about expose function. I just wonder why it will be fuzzy if there is only one window. I can't understand why the slightly shrinking will make that.