We're obsessed with a Tumblr blog called Little Big Details, which features tech tools and features in popular products that you may have missed.  But boy do they make a difference. LBD's latest entry is a tip for Mac users who want extra volume control. By pressing the Shift + Alt + the volume keys on your keyboard, you can adjust your Mac's volume in 1/4 increments.  Give it a try. It'll change your life. Please follow SAI: Tools on Twitter and Facebook.Join the conversation about this story »