Just use the little blue play button..this will have the same effect as muting in the mixer

You will experience a momentary muting of the audio if you have "mute frees system resources" checked under Basics>Automation Setup. I forget if that defalts to on or off..better see for yourself :eek:

Do you mean mute a track, multiple tracks (group faders, or solo all other tracks), or mute different sections(soundbites) within a single track? If it's the latter, you could duplicate a take, erase all you want, and still have the original unscathed in take 1.