Do the following to change the attributes of an already existing tier:
Click on the drop down box and select the tier which attributes you want to change. Thedialog window for that tier appears.
After making the changes, click onto save them. Otherwise click to exit the window without saving.
Changing the Parent Tier in this dialog is only possible if there are no annotations on the tier (because of possible data loss). To change the Parent Tier in case there are already annotations, use the Reparent Tier option (see Section 2.4.9). Similar limitations apply to changing the Type of the tier, for the same reason. To change the Type of a tier in a safe way, use the Copy Tier option (see Section 2.13.2).