Does anyone on this board know how to use the online tab to submit a mutliple descendant report document?

I am using Legacy 7.4.6 and I have a need to combine many descendant reports into one, such as in the multiple descent report feature from the "publish" tab, however, the catch is that I want to do this using the ONLINE key on the top menu bar which gives me interactive html reports and a gendex index, etc...  much better report for online purposes, but I have yet to achieve submitting multiple reports.

Can anyone help me?