PowerPoint 2010 hidden feature: Combine shapes to create your own shapes!

PowerPoint 2010 users: Feeling envious of PowerPoint 2013 users' new merge shapes feature? You already have that feature in your PowerPoint 2010, but it is hidden. The free PowerPointLabs add-in 'unhides' it and puts it in the 'Format' ribbon, as shown in the above diagram. Alternatively, you can use the 'customize the ribbon' option to bring it out yourself.