For makers of tooling drawings or weldments some people will struggle with parts lists trying to get the item number using "callout" for the ballooning method to stay fixed in line with the component number.
That is to say that the drawing has one number say A123 and each of the details are numbered A123-1, A123-2 etc. So if you have 5 items and delete number 3 then the remaining item numbers using the automatic callout would be numbered 1,2,3,4 when you really need to have 1,2,4,5 for historical reasons. In this case we edit the callout numbers in the parts list table to get it to work.
This may not be you but in combination with John's earlier post you can probably handle even the most complex of cases.
Cheers
Hudson