Right Clicking either an Export Group or Export Asset will bring up a menu with options to apply to the list of items or to the item that was clicked.
Sort By... - Sort the display of Groups or Assets in a variety of ways.
User Order - Use the order that the user has manually set with the Sort up and down buttons.
Name - Sort all items alphabetically.
Date - Sort all items by the date that they were created.
Timeline - Sort all items by their start frame.
Remove - Delete the Group or Asset.
Export - Run an export on just the clicked Group or Asset.
Zero Character - Add a Zero Character Property to force exported animation to start from world 0.
Remove Root Animation - Add a Remove Root Animation Property to remove all animation from the root of the exported skeleton.
Add Rotation Curve - Add a Rotation Curve Property to convert a rotation channel on a specific joint into a 0-1 value for the engine to continually drive rotation.