There are many types of Gantt charts online. Some offer you the most complicated systems that promise to automate everything. Well, the truth is that if a tool tries to be good at everything, it succeeds in nothing. That's why we're doing our best that Teamweek would exceed in a narrow area of plan changing and task assignment.
If you have a team, you need to plan their time. The simpler the tool, the less time spent on just planning. That's why we believe in rough planning and the ease of changing those plans to match reality.
So, we've made it as easy as it sounds. If you need to add a task, all you need to do is to click and drag. And when you reprioritize, just drag and drop to rearrange the Gantt chart online.
To duplicate task, hold cmd (ctrl for PC) and then drag and drop.