bezelStyle
The appearance of the button’s border, if it has one.
Declaration
var bezelStyle: NSButton.BezelStyle { get set }Discussion
The value of this property is a constant that specifies the bezel style used by the button. See NSButton.BezelStyle for a list of possible values. If a button is borderless, the value of this property is ignored.
A button uses shading to look like it’s sticking out or pushed in. You can set the shading with the gradientType property.