One simple thing to make presentations visually appealing is to ensure a consistent style. If you are using outlined shapes, stick with outlined shapes. If you

One simple thing to make presentations visually appealing is to ensure a consistent style. If you are using outlined shapes, stick with outlined shapes. If you are using semi-transparent boxes stick with them. So often I see presentations with multiple type faces (where it isn't warranted) and different styles of diagrams. It can be distracting and give the sense that the presentation was just hastily assembled from various other presentations (whether true or not).