Try Fewer Borders instead of wasting attention.
Borders compete for attention with real content. Attention of course is a precious resource since we can only grasp so much at any given time. Surely borders can be used to define a space very clearly and precisely, but they also do cost us cognitive energy as they are perceived as explicit lines. In order to define relationships between screen elements which use less attention, elements can also be just grouped together through proximity, be aligned, have distinct backgrounds, or even just share a similar typographic style. When working in abstract UI tools, it’s easy to drop a bunch of boxes everywhere. Boxes however come with a false sense of being immune from the order and unity which governs the rest of the screen. Hence pages with lots of boxes sometimes may tend to look noisy or misaligned. Sometimes it is helpful to throw in a line here and there, but do consider alternative ways of defining visual relationships that are less taxing to attention and your content will come through.