To move a dimension or member:
Select a dimension, member, or members.
Right-click and select Cut.
Select a target dimension or member, right-click, and select an item:
Paste child to paste as the first child of the selected dimension or member.
Paste sibling to paste as a sibling of the selected dimension or member.
You can also select a single member and use the mouse to drag it to the desired location in the outline.
To drag multiple members, select the members and press and hold the right mouse button as you drag the members to the desired location in the outline.