Imagine you're viewing a business presentation where every new slide feels like a scene from a different movie: new layouts, new images, new text... While this might seem visually exciting, it makes the brain work harder. That's because when everything changes at once, the brain needs to hold onto the previous context, adapt to the new one, and anticipate what's coming next. What can we do instead?
In this presentation on the rise of LED technology, the first slide introduces three key domains: electric vehicles, solar and wind, and lighting. Rather than abandoning that layout in the next slide (see Slide 2), the presenter overlays the chart directly on top of the previous design. The structure remains familiar, and the brain doesn't have to start from scratch: it can anchor to what it already knows and absorb what's new: the numbers. This technique reduces cognitive workload by using continuity.
So, consider this guideline: You don't need to design every slide as if it's brand new. Look for opportunities to overlap concepts, layouts, or visuals across slides. Especially when introducing data, try layering it over a previous context rather than replacing it completely. Familiarity can be a cognitive shortcut, so use it to your audience's advantage.