Foe Arc Tool, There is also an Envelope docker, or Envelope inspector on the Mac, which can be opened by going to Window > Dockers > Effects > Envelope.
GitHub - brodo97/FoETools: Some tools you can use to manage your Forge Of Empires' villages. Mostly written in Python 3
Sécuriser P1 P2 GM pour Booster 1,9 - Forge of Empire (FOE) - YouTube