Within the Timeline or Interlinear Viewer, you can rearrange the order in which the tiers are displayed. Just drag the tier label to its new location. The tiers will be displayed in the new order.
If you exit the document, ELAN will save the order of
tiers in the following way: first, all activated tiers (in the order
as they appear in the Timeline or Interlinear Viewer), followed by
all non-activated tiers in alphabetical order.