How to combine shapes to create a custom shape in PowerPoint 2013?

Merge shape helps you to re-combine the build-in shapes in office 2013 to create an ideal shapes for you.

1. Draw a shape.
2. Select the shapes to merge.
   
3. On the [Drawing Tools] tab, click [Merge Shapes], and then pick the option you want.
   
4. If you want to use the shape later, right click it and select [Save As Picture].