The ordering of locations (and sub locations) is executed as follows from the Location Explorer screen:
Top tier Locations: Select the client name in the location explorer tree and then choose "Order Top Level Locations" from the side menu.
Sub Locations: Select the parent location in location explorer and choose "Order Sub Locations" from the side menu.
Locations and Sub Locations can all be ordered independently.
Locations can be ordered:
Aa - Zz
Zz - Aa
By manually selecting one of more locations and using arrow keys to move up and down.