this is really dumb but for me it is handy:
say you have several wav files and you want to be able to clearly see wav form on them all [zoom in] but ONLY want to actually hear one of them...
ah Mute you say? but then the wav form turns dark or black and is not easily seen.. you see? [or rather, no, you can't see!
]
OK silly as can be... just pull the volume down to zero... the track will not be heard but the wav form will look just the same.
Don't want to upset the Vol slider? OK, make an envelope and don't add points, just pull that first point down to zero... later remove the envelope to hear the track