Images on presentation slides are most powerful when they follow the rule of thirds. What is the rule of thirds? The rule of thirds refers to dividing a slide into thirds (both horizontally and vertically):
Here’s an example of a slide by Eugene Cheng that follows the rule of thirds:
Notice how the subject has been placed along the line (at the point of intersection), which is more interesting than having the subject placed in the center of the image. Plus, having the image positioned this way allows you to use the remaining space to add text.