Index part list generates a sequence number for each item in the Assembly List.
Items are sequenced from top to bottom. You may need reorder the items before sequencing.
Item sequence affects the order in which the items are listed in Assembly Workshop.
Arrange the items as required.
Choose Action > Index Part list.
You can also access this option from the right-click menu.
You cannot reorder items when Show also parts in sub-assemblies is active.