Size handles
Size handles appear as 4 or 8 little black boxes at the edges of a selected annotation element. Size handles are used to change the size of an object.
To change the size of a text, legend, box, scale bar, North arrow, bitmap or picture in the Layout editor:
Dragging one of the corner handles maintains the original height-width ratio (isotropic).
Dragging one of the middle handles resizes the annotation horizontally or vertically; the height-width ratio changes (anisotropic).