Comment by al_borland

Here is what they say:

> In general, give an interactive item a rounded shape. People’s eyes tend to be drawn toward the corners in a shape, making it difficult to keep looking at the shape’s center. The more rounded an item’s shape, the easier it is for people to use their eyes to target it.

The page also talks about leaving enough visual space between elements as well as many other considerations for this type of interface.

https://developer.apple.com/design/human-interface-guideline...