Using a color scheme and no more than two fonts adds cohesion to what you're presenting and gives you and your presentation a clear identity. One option is to use PowerPoint's design gallery ...

One of the most popular presentation tools, Microsoft PowerPoint, offers a range of design templates with varied colors, ...

You can also customize it so that it reflects your brand colors. Additionally, the software has the facility to import existing PowerPoint presentations, so if you have a dull-looking presentation ...