Helpo de LibreOffice 7.5
Restarts list numbering from 1. This command is only active when the cursor is positioned within a list.
Place cursor in a list paragraph, right-click and choose.
On Bullets and Numbering bar, click
To remove the numbering restart, apply the command again in the paragraph where the numbering was restarted.
To restart numbering with a number greater than 1, right-click in the paragraph where you want to restart numbering, choose Outline & List tab, select and enter the start number in .