How to move timeline?

Hello together. I know there is a fast way just to move the Timeline. Important: without changing the beginning of my first task or in the worst case changing all the tasks if i had not connected them already.

I hope there is someone who can help me. Thank you!

You can drag the chart using mouse.

If I drag the timeline there is only changing the viewport.

The result should be that my project starts to any other time than original.
For example when a project originally starts in January, than is set back in timetable to October.

If you want to move the project, go Project > Properties > Calendar