Notes:

• Alternatively to this procedure, you can also remove structure identifiers no longer in use from the database globally with [Extras] > Clean up all.
• If you attempt to delete a structure identifier that is still in use in the schematic, a message appears to that effect and the action is canceled.
• If a page or a device is deleted whose structure identifiers are not used in any other place in the project, then this identifier is still not removed from the database. Deletion of structure identifiers is only possible in structure identifier management.