With this slider, you can adjust master out volume.
1. Volume slider
Move the slider up or down to boost or reduce sound volume.
2. Sound volume value
Value in scale from 0 to 140.
NOTE: This slider is not and should not be the same as the one in playout tab.
For example: If you set this one to lower or higher value, slider in playout tab should remain intact. This also works other way around.