Home » Tip of The Day » Switch Between The Blur and Sharpen ToolsSwitch Between The Blur and Sharpen Tools September 6, 2015. Posted in: Tip Of The Day. While working with either the Blur or Sharpen tool, press-and-hold Alt (Mac: Option) to temporarily alternate between them. Release the Alt (Command) key to return to the original tool. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: