when i was trying to minimize the window of iTunes, i accidently pressed "alt" with "cmd" and "M" and this headphones volume appeared!
http://img801.imageshack.us/img801/7220/capturadepantalla201011b.png
can u guys tell me what does that mean? is there any difference about the volume and this headphone volume?
maybe the question is stupid, i'm sorry i'm new on macs
help would be great

http://img801.imageshack.us/img801/7220/capturadepantalla201011b.png
can u guys tell me what does that mean? is there any difference about the volume and this headphone volume?
maybe the question is stupid, i'm sorry i'm new on macs
help would be great
