The document describes how to edit an arrow diagram in PowerPoint. It outlines the following steps:
1. Ungroup the object by right clicking, selecting group, and then ungroup to edit individual elements.
2. Edit the color of shapes by right clicking, selecting format shape, and choosing a solid or gradient fill color from the options.
3. Alternatively, colors can be changed by selecting a shape and choosing from the built-in theme colors in the design tab.