It is useful for designers of user interfaces to understand some general design principles. It can only make them better UI designers and deliver a better user experience.
It might seem that the positioning of elements on the screen shouldn't be that important. Surely, it depends on the style of the Qlik developer. However, is it important? It is important because we need to consider the person who is clicking the mouse. The user should always be considered in any design of layout, and we should strive for a clean design, consistency, and ease of use.
Donald Norman is a famous person in the area of design. Not in the area of data visualization at all, but just the design of everyday things. In fact, one of his best works is called The Design of Everyday Things.
Norman adopted a term that is now central in design: the idea of affordance. Originally, an affordance means all of the things that an item affords you to do with it. For example...