Board Game Arena

Hello, I would like to know how can we change time settings when people have already joined your tournament ? Is it still possible? It does not seem, can someone help ? (this is the link of the tournament : http://en.boardgamearena.com/#!tournament?id=3894 )
Thanks by advance

No, you can't change it...

After create a tournament, you only can change the name and the logo trophy. Generally people cancel the tour and create a new one... -i do it too-