In free version, how can I reorder the tasks in the Chronology Gantt Chart view?

In free version, how can I reorder the tasks in the Chronology Gantt Chart view?

I'm using the free version of Zoho Projects, and I would love to re-arrange the order of tasks in the Gantt Chart. Currently, the default is by percent completion, but I'd prefer them ordered by TaskList, so that groups of tasks are more meaningfully clustered. I don't see an obvious way to do this. Is this possible in the free version, and if so, how? Thanks!