You can rearrange assets by using the reorder buttons in the lower left corner of the screen. These buttons will be enabled if the Sequence column is selected as your sort column (the selected sort column will contain an arrow circled in red below). If the rank/sequence column is not selected, these buttons will be disabled. Additionally, you can sort assets by clicking on the headings at the top of the grid. An up or down arrow will appear signifying ascending or descending order. Click the heading again to change the direction.