recording mute changes

after you've recorded your mute changes on a "song" with 88 bars, and you want to re-record your mutes over from scratch; how do you delete the mutes you've recorded. i know you can go in to "step edit" and turn all the mutes from mute:off to mute:on manually, but 88 bars is a lot. does anyone know of a faster was to do this? how come there isn't a "whole" f6 for this if there isn't a faster way? if you could give me step by step on the proper way to record my mutes to my "song" and if not satisfied, how to re-record the mutes till i like it. i'd appreciate it. in the e-book it says to "go to MAIN, and navigate to any track and cursor to the far right and highlight "Mute:OFF".(i don't see the mute so i can highlight it), Press WINDOW to see the following screen: "Use track mute events: OFF" and set to ON and press CLOSE. I'm using "JJ OS", how do you perform these instructions using the JJ OS? thanks in advance