Move Regions With the Mouse
With the pointer in the region, using a Left-drag will make the region follow the pointer as it is moved around. By default, the region can move freely along the timeline.
To move a region from one track to another, the move must be started as described above, but the pointer should end in the desired track. The region will follow the pointer.
if some other kinds of tracks are visible, the region will remain where it is as the pointer moves across them, and will then jump to the new track. This serves as a visual reminder that an audio region cannot be dragged into an automation track or a bus, for example.
Move Multiple Regions
In order to move multiple regions, they should be selected before moving. Then Left-dragging one of the selected regions will move all the regions, keeping their positions relative to each other.
Moving region(s) to other track(s) while keeping them at the same exact position on the timeline is done by simply using a Middle-drag instead.