Cannot find the Gantt

Hello everybody, I’m new to Kanboard and I’m an enthusiast of it 'cause it seems to be a really good product. By the way, I installed it on a Synology nas, and evenrything seems to be OK.
Except one thing… the gantt button.
From the documentation (Boards — Kanboard documentation) I see that there should be a gantt button in the board view, but I’ve no got it. I’ve got only buttons for Board and List.
Can anybody please show me hov to activate this button?
Or, why I cannot see it?
Andrea (Italy)

Oh, I found the answer by myself.
It’s a plugin. So I installed the Gantt plugin and everything works ok.
Great product Kanboard.
Ceers from Italy to everybody.