Grouping bits into bus ?

[ba38]

Hi All
And thanks for this very nice software.
I have design a circuit which is built from single bits (outputs S0,..S7 for instance) and I would like to group them into a bus S[7..0]. It would be simpler for designing a test file (or several ones) and much less prone to errors.
I don't find either in the menus, neither in the help file.
How can I do it ?
Thanks a lot.
Bernard

[Slicudis]

Use a splitter/merger