Starting with the sixth string, and only removing one string at a time, turn the corresponding tuner in a clockwise motion until the string is loose enough to pull through the tuner, removing that end of the string from the guitar. Once you have removed the string from the tuner, pull it through the bridge of the guitar to fully remove it from the instrument. Always pluck the string as you unwind it to make sure you are turning the tuner in the right direction. Turning the tuner in the wrong direction may cause the string to break.
Replacing the Strings
Once the string has been removed, starting with the sixth string, remove the new string from its package. Pull the thin end, non-ball end, of the string through the empty bridge slot until the ball end catches on the bridge. This locks it in place. Pull the string taut against the neck of the guitar so it stretches over its corresponding tuner. Mark the string about 1 inch past its corresponding tuner and bend the string away from the guitar at this point to create a kink in the string. Pull the string through the tuner, from the inside of the guitar to the outside, until it reaches this kink. When the kink has been reached on one side of the tuner, bend the string on the other side of the tuner to create a "lightning bolt" shape. This will lock the string in place. Wind the tuner in a counter-clockwise direction to tighten the string. Use your right hand to help keep the string in place as it's being wound. Once the string becomes tight, tune it to the proper note. Repeat these steps for each string, only removing and replacing one string at a time.
Tuning and Stretching the Strings
Once all of your strings have been replaced and given an initial tuning, you're ready to properly tune and stretch each string. Starting with the sixth string, tune it to the note E. Once it's in tune, pull up on the string while sliding your hand up and down the string to stretch it. This will cause the string to go flat, so you'll need to re-tune the string at this point. Repeat this step 2 or 3 times per string. Stretching each string will help them get in tune quicker and stay in tune longer over time.
