This is easy.

(word2003) format - bulleted and numbered - multi-level symbols - randomly select a multi-level symbols, click the bottom right corner of the "Customize"

In the dialog box that opens, you focus on the following picture of the three red boxes, respectively, "level" "numbering format" "Numbering Style". The following is the focus:

In the numbering format, the number is a gray background, in addition to this part can not be moved, you can feel free to add symbols before and after the number, such as (), the first ? chapter, section, and so on.

In the "level" in the selection of 1, in the numbering style, select "one, two, three (Jane)", in the numbering format of the "one" in front of half a bracket (, in that "one" followed by half a bracket), the first level of numbering is complete;

In the "level" in the selection of 2, in the numbering style, select "1,2,3, ..." in the number format, in addition to the number 1 of all things are deleted, and then in the "1" before adding half a bracket (, in the "1" after adding half a bracket), the second level of numbering is complete;

Similarly, 3, 4 level of numbering can be done. can be done, in the numbering style of upper-case numbers, lower-case numbers, upper-case letters, lower-case letters and other types to choose from, to meet your needs.

(word2007) paragraph - multi-level list (point it to the right of the small arrow) - the definition of a new multi-level list, the other steps on the same with the above.