The order of series in a study is set at the modality, and can be changed by applying hanging protocols. You can also use the Rearrange Series tool to drag and drop series from one location to another.
To reorder series manually
Select a screen format that displays two or more series at once.
From the context or top toolbar, click Rearrange Series.
Or, if using the context toolbar text menu (Ctrl + right-click), select Organization > Rearrange Series.
Place the pointer over the series to move.
The series is framed.
Drag the series to its new position.