Deleting Sections from Lead Gantt
1. To delete a section, select all the rows of the section - the header row and the child rows - right-click, and then click Delete rows.
Once you delete an entire section, you will notice that the row numbers will be automatically adjusted.
However, if you delete just the header row, the child rows will be orphaned and the numbering of your Gantt chart will not be correct from that point on.