One of the first things a new guitarist learns is how to tune their instrument. The accepted method of tuning (EADGBE, from lowest to highest string) is known as standard tuning. It has been in use practically since the guitar was converted from a five-string to a six-string instrument in the 17th century and serves most guitarists quite well. But there's more than one way to tune a guitar. In fact, the number of tunings at your disposal is limited only by your imagination. Guitar tuner buttons play an important role to make it a perfect one.