Format of message numbers when using rose to draw a sequence diagram

When using rose to draw a sequence diagram, there are three formats for the message number, the first one does not display the ordinal, the second is displayed sequentially, and the third is displayed in nested format, as shown in figure (1) (2) (3):

Figure (1) does not display the serial number

Figure (2) display by order

Figure (3) nested display sequence number

Above three formatting: Click Tools-->options, select Diagram in the Pop-up dialog box, corresponding to tick sequence numbering and hierarchical message. As shown in Figure (4) (5):

Figure (4)

Figure (5)

Sequence numbering ordinal hierarchical message hierarchy messages (nested ordinal)