I understand that "full justification" is on the list of enhancements to the text-processing-engine; but there’s no g’tee when the next release might be available (I’ve seen "late summer"), or even if that will be included…
If I may just say that for small areas of text, justified is fine, but large areas of justified text are not "reader friendly" and do not make for a pleasant or comfortable reading experience. So it is wise to use this particular format sparingly IMHO.
