I would like to know if it is possible for org-mode to open its org files in unfolded state, and possibly with specified level (e.g no more than * headlines) and possibly with option to fold/unfold bodies as well.
You should check the
You can use
Allowed values include: overview, content, showall, showeverything.
I don't recall an option for specifying a global N levels of visibility (you can put together some elisp for this); anyhow this is quite easy to do on the keyboard (e.g.
Start-up folding is controlled by the
any where in the buffer.