while tired i've created duplicates, and added family who turned out not to be, so had a reason to delete people from the family tree.
Since doing so i've found gaps in the ID's, and wonder if it can be done now, or if not, added as a feature where i can rearrange or reset the ID so the gaps are filled.
E.g. 1. 2. 3. 4. 6. 9. 11. 12. 13. etc then rest them so they become 1. 2. 3. 4. 5. 6. 7. 8. 9.