What is the difference between choosing ‘pixel units’ and choosing ‘percentage units’ for an element of the skin?

Any element within your skin can be located on the canvas either in absolute or in relative terms. This will define how an element will behave when the size of a tour is bigger or smaller (depending on screen resolution and device of your clients). When choosing to place elements in pixel units, the size and relation will be fixed – no matter how big or small the screen is. When choosing to place elements in percentage units, the elements will grow and arrange relative or according to the size of the virtual tour canvas.