The principle of unity is one of the most important design principles. A design is unified when all the elements work together to support the design as a whole. It is unified when the elements don’t compete with each other, but rather support each other towards the common goal of communicating a message. The elements of a design should look like they belong together, rather than being arbitrarily placed on a page, slide, website, etc.
- People naturally look for a connection between elements. They see the whole first and then the sum of its parts.
- The goal of a design is to communicate a single message. [Tweet this] The more your elements are unified, the more the viewer will perceive your message as a single message.
Better yet, use the same professional font. Calibri is not a professional font. Helvetica is a professional font. You could use two (at most three) fonts as long as there is a reason for it. If there is no reason, then stick to one font only. In the presentation below I used two fonts: Gotham and Over the Rainbow. The former as the main font and the latter to give some additional comments a “human” touch. The reason for a second font was that I wanted to distinguish the main content from the comments.
This presentation by Ethos3 is a perfect example of consistency in the use of imagery. As you can see, the designer applied the same greenish effect to each image.
Extra tip: to achieve a similar effect in PowerPoint or Keynote you can simply place a coloured rectangle above each of your images and increase the transparency. It won’t be exactly the same effect as in the above deck, yet it’ll make your images look like they belong together. In the before-after slides below, you can see the original images on the left and the same images with a transparent blue shape placed above them on the right.
Even better, derive a colour pallet from an image that best represents your message. Don’t worry, you don’t have to be a professional designer to do this. Last year I wrote a super easy step-by-step guide on how to derive a colour pallet from an image and use it throughout a presentation.
Ideally, the relationship between the elements of your design should be so well defined that whatever you change would make your design worse.
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