You can reorder items in the tree without changing their absolute position. You can do so by holding the Shift key while you drag and drop items within the tree.

This operation modifies the relative position to maintain the same absolute position.

You can also right click a target and use the Change support option.

Tip: More information available in the Reference Frames section.

Video: https://www.youtube.com/watch?v=vDa4SvnJZLA&index=12&list=PLjiA6TvRACQcNitucNzKjV9_V3UFnSich.

Reorder Items in the Tree without moving them