How to do a customization dialogue of multi level list in Microsoft word?

Select the text or numbered list you want to change. On the Home tab, in the Paragraph group, click the arrow next to Multilevel List , and then click Define NewMultilevel List. Expand the Multilevel list dialog box by clicking More in the lower left corner. Choose the list level to modify by selecting it in the list.

A technical document frequently requires the use of multilevel lists, such as in the following example:

Text processing software, Desktop publishing software, Software for long structured documents