Sure! Our graduation thesis requires that the formats of the first-level title, the second-level title and the page number in the catalogue are different. . . But we have a strange problem. On my classmate's computer (she uses word2007), it is impossible to choose only page numbers. Select all lines at a time. On my computer (I use wps), I can just select the page number and then modify it. So I suggest you change your computer or a different version. . . I still think 2003 is good! In fact, office system software will be really troublesome to use. Small problems sometimes confuse you, but they can be easily solved by changing computers, which may be the default setting!