Hey guys..my co-worker tells me i can drop tune my guitar using my digital tuner. I have a boss tu 80. I tried, but it doesn't seem to be working. when i pluck the 6 string...it says it's the 6 string...no matter how low i put it.

Can anybody explain to me how to down tune using a tuner?

Right, if when you play your 6th string it says the note E ? If so just release tension on the string till it changes to the note you want to play.