What is clear to you is hardly ever clear to everyone in the audience. A screen shot with a cleverly integrated login feature, a photo of a long line of people who cannot wait to try your product, an image of an unhappy customer. When in doubt, put a big call out or title that says what the audience is expected to see.

------------------
If you liked this post, why not subscribe to daily updates about presentation design via email? Just blog posts, no spam, or you can follow Jan on Twitter to never miss a thing.