If you’ve ever found yourself thinking your Mac’s Dock is to large or to small this tip will help you change the size as well as a few other Dock options quickly and easily without opening System Preferences.
To do this trick, locate the “cross walk” looking area between your Applications and your Stacks and the Trash area. Once you hover over it you’ll notice the cursor changes to a resize looking pointer, drag up or down to set a new size or right click (Control + Click) to bring up a menu like the one pictured below.
The popup menu provides quick access to options like enabling or disabling Dock Hiding and Magnification in addition to the location (left, bottom or right) of the dock and the minimize effect used when minimizing an application window. At the very bottom of the menu is an option to launch the Dock preference pane in System Preferences.

