Advanced—This tab will display only the selected instrument. From here, you can fine-tune more specific settings that can be also found in professional software.
Mute—Toggle whether an instrument plays or not.
Solo—Isolates the instrument during playback.
Reset—Returns all settings to default for this instrument.
Volume—Another slider to adjust volume.
Delay—Enables Delay.
Reverb—Enables Reverb, more reverb options can be found via the dropdown menu.
Reverb Slider—Affects the amount of reverb.
Panning—Shifts an instrument's presence between the left and right outputs of a stereo system.
Detune—Allows you to pitch bend the instrument. The slider will automatically snap to basic values in the 12-tone temperament system, but you can use Shift+Drag to freely change the slider so you can make microtonal music.
Equalizer—A three-band system where you can change the EQ properties of an instrument. For more information about using EQ, I've written another article here.