Touring plan problem with manually swapping items

i need to know how to manually swap items on my plan. I try dragging but won’t work??

Did you try it on the computer? I do not think it works on the app; but even on the computer it is sometimes tricky - you have to left click on the line to be moved, drag it to the spot you want and do not let got of the left click on the mouse until the space between the previously back to back lines opens up (otherwise it will move right back to its old spot) - hope this helps