Reordering  Layers and Columns
                                                        You can change the order of your elements in the Timeline view
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In the Timeline view, select the layers to move.
                                                                         
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Click and drag the selection, then do one of the following:
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Drop the selection between two layers to move it between those layers. A cyan line will appear between the layers where the selection will be moved.
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Drop the selection onto a layer to rig the selected layers as children over that layer.
                                                                                 
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- In the Xsheet view, click on the column’s header with the middle mouse button.
 
- Drag the column to its new position.