The Spin feature allows you to spin the center circular area of the artwork, like a vinyl record.
Free users can enable or disable the feature. When enabled it spins the full center circle.
Pro users have more options:
RADIUS - set the radius of the spin area to any size, good for certain artwork styles
SHADOW - add a drop shadow behind the spin area, good for punching out the middle
SOLID - add a solid color behind the spin area, good for focussing the viewers attention
Tips:
Use the SOLID feature to create alternate-styled video from your regular artwork.
The SOLID colors are taken from the dominant colors in your artwork so they'll always be on-brand.
Use the SHADOW feature to lift the center area off the background, giving it a 3D feel.
Use SOLID and SHADOW in combination to differentiate tracks or to highlight a promo.