Re-position plan within grid

I want to re-position my track plan so that the left-hand end aligns with the zero point on the horizontal grid. Is this possible, please?

Just grab one of the red/blue circles (by left clicking and keep button pressed) and move the layout to its desired position. If you don't have any red/blue circle visible (eg in a circular layout), you probable need to double click in the connection of two track pieces to "brake the connection)

Thanks