Among the many new features in PowerPoint 2013, probably the most useful yet less obvious ones are the capabilities added to Guides. New for this version are these extra capabilities: Guides can be added through the right-click menu, and you can add new Guides that are offset to your existing Guides. Guides also no longer need to be gray in color — you can choose from 10 colors. You need not drag a Guide off the slide to remove it — there’s a dedicated Delete option.
Explore new Guide options in PowerPoint 2013 for Windows.

