SATB choir on two staffs
Create the parts one to a staff using the Voice Preset commands (Staffs/Voices->Voices menu)
Then use the Staff Groupings to set Choir staff start and end.
(no longer needed is join the staffs with Join Voices before printing, that just affects the display
You can edit two voices on one staff, but it is best to use Split Staffs first.)
Note there a template for this (see Open -> Templates), and in Open -> Example there is a file showing how to typeset lyrics above an below the staffs for the four parts.
without showing what actually needs to be done and how it should look like.
For example what does "Create the parts one to a staff" actually mean?
It is very hard to follow something if you don't know what the actual output is supposed to be!
Thanks
Frank