When you open a previously saved segment, you have the option to edit this segment. You can edit an existing segment, edit a duplicate segment, or delete any segment. When you open a segment, the filters automatically load into the interface, allowing you to view your filters but also edit them. When you press ‘save’ now, a window will pop up offering you two options: you can either ‘update segment’, or ‘create new segment’. The first option will simply edit the existing segment, whereas the latter will create a new segment, leaving the original intact.