BartenderOne instructional videos presents how to cut a citrus wheel. Citrus wheels are generally used for fashion rather than function. By cutting a wheel instead of a wedge, you end up with a good looking garnish, without getting any of the juice of the lime in the cocktail.
BartenderOne instructional videos presents how to create a citrus twist.
When creating a citrus twist, be sure to use a channel knife. When the twist is complete, pull on either end of the twist over the cocktail to release the oils from the twist which will add flavour to the drink.