The Debuff Warning tab controls how alerts are sent on debuffs.
The dropdowns have the same options for all settings, alerts can be when within spell range, within 100 yards (visible range) or always.

• Always enable bar - When not settings the health bar to the debuff colour, always set it to enabled if not already in this state.
• Change health bar colour - Change the bar colour to the setting defined.
  • Only when dispellable - Only apply if the debuff can be dispelled.
• Display warning on debuff - Display a text warning.
  • Only when dispellable - Only apply if the debuff can be dispelled.
• Play sound on debuff - Play the sound set on the slider below the option.
  • Only when dispellable - Only apply if the debuff can be dispelled.
• Sound channel - Select the sound channel to play the debuff sound.