Extand default overlay. You can edit overlay objects by editing config in runtime.

Put files to bot plugin folder.

  <RebornBuddyRootFolder>\Plugins\FFXIVOverlayMod

Create config at

  <RebornBuddyRootFolder>\Settings\<character name>\OverlayMod.yaml

Config Sample:

  ConfigExample\OverlayMod.yaml

Edit config: add Npc, spells. Save config. Reactivate plugin or press button 'Reload'