It is not necessary to delete planning elements if, for example, you have not created activities chronologically.
If you want to change the order of planning elements, proceed as follows.
1. Click on one or more planning elements which you want to move.
2. Hold down the mouse button and drag and drop the planning elements to the desired position. An orange line symbolizes the position to which the planning element is moved.
3. As soon as you release the mouse button, the planning element slides into the selected position.