Space Attribute

// PropertySpace and Space attributes are virtually identical.
[Space]
[BoxGroup("Space", ShowLabel = false)]
public int Space;

// You can also control spacing both before and after the PropertySpace attribute.
[PropertySpace(SpaceBefore = 30, SpaceAfter = 60)]
[BoxGroup("BeforeAndAfter", ShowLabel = false)]
public int BeforeAndAfter;

// The PropertySpace attribute can, as the name suggests, also be applied to properties.
[PropertySpace]
[ShowInInspector, BoxGroup("Property", ShowLabel = false)]
public string Property { get; set; }