How do I update a table of contents, when you have inserted new pages into the document and some of my heading names have changed. Do I have to delete the existing Table of Contents and set it up again?

No you do not need to set up the Table of Contents again, there is a much quicker way of updating.

Once you have made the changes in your document, such as adding new pages and changing headings that are already in your existing Table of Contents. You just need to right click on the existing table and select Update Field.

Select Update Page Numbers only or select Update Entire Table (which will update the page numbers and changed headings)

Click OK to effect the changes.

This action can be done as many times as you wish.

Table of Contents is covered on our Word Advanced course. Please check the syllabus on this website.