Renaming slides in layer slider

Hi,
This is probably very simple, but I can’t seem to figure it out. When working with the Layer Slider, I can’t seem to rename a slider once I’ve duplicated it. The new one created from the duplication is just called ‘copy’, but I would like to then edit it and give it a new name. The crazy thing is that I managed to do this once last week, but now I can’t!
Thanks,
Karen