This has become a very nice tool! Still, I see a problem:
1. Select some heading in the userguide. 2. Demote it so much that it is no longer numbered. 3. Note that it is now no longer electible for promotion, so no way to undo the effect manually. It isn't supposed to be like that, is it? I suggest that one shouldn't be allowed to demote down to a level from which promotion isn't possible. Or alterntatively, allow promotion of lower levels. Helge Hafting