The clip detector at the top of each level meter turns red if a channel's volume is too high.
If the clip detector is black, the number in it shows how many dB below 0 the channel peaks at, and thus how much higher the volume can go before clipping occurs. If the clip detector is red, it shows how many dB over 0 the channel peaks at, and thus the number of dB by which you need to reduce the volume to bring the channel's level back under 0 dB.
Level meters hold the channels' peak levels for a few seconds, making it easy for you to see volume peaks.
The Track Mixer displays the same channels as the Arrange window, in the same order.
The Track Mixer's filter buttons are used to hide or display specific track types.
Fades created in the Arrange window are nondestructive and do not change the original audio files.
To create a curved fade, hold down Control and drag up or down on a fade.
A Send (located below a channel's Insert slots) splits a portion of a channel's sound out and sends it through a system bus to another Audio Object.
The CPU window is used to monitor your computer's performance.
The Freeze button, which looks like a little snowflake, appears on every audio track and Audio Instrument track in the Arrange window.
When you freeze a track, Logic renders the track and all its plug-ins into a high-quality audio file that it plays instead of the original track. All plug-ins are temporarily deactivated, and they will place no further strain on your system until you unfreeze the track.