Similar as QA-12800, but on WBS.
With WBS diagrams you can remove the box to show pure text (eg "++_ America"), eg see here:
Unfortunately this works only with the "Arithmetic or plus-minus" notation, it doesn't work with the "bullet item" notation (eg "**_ America") as you can see here:
Could you make the underscore work with the WBS OrgMode notation?
Thanks for your support,