Apple Logic Pro 8 - Manual (Page 206)

206 Chapter 9 Working With Tracks
Using Track Button Slide Activation
Track buttons on arrange tracks (Solo, Mute, Hide, Track Protect, Node, Freeze) support
slide activation, which is similar to running your finger across several channel strip
buttons on good hardware mixing consoles.
As a usage example of slide activation in Logic Pro, click-hold on the Mute button of
one track, and drag the mouse up or down. The Mute buttons of all swiped tracks will
switch to the same state.
Simply drag over the Mute buttons of the same tracks to undo the Mute.