All of the advice I have read is that this cannot be changed, and that you should not fight against Revit - just go with it and accept the way it is. Most of the time I would agree with that advice, but just occasionally you might be forced into beating Revit in this battle . . . .
Like maybe your boss threatens to sack you if you can't make such a simple change to a drawing; or the client threatens to sack your boss . . .
The Revit Contour Label Orientation IssueMost of the time this issue is not a big deal, but some numbers can be confusing when read upside-down - 6 & 9 for example.
How to make Revit contour labels readableThe only solution to this problem that I could come up with is to put a tiny zigzag in the contour so that for a very short distance the contour direction is reversed. you can then apply a lable to this section. It is not so easy to do because when you edit a toposurface Revit likes to take shortcuts when you place points of a similar height very close together.
With any luck, the contour label will obsure the zigzag. Obviously you need to remove the upside-down label by shortening the line - that means you cannot have one continuous contour label line running across several contours. You have to resort to lots of tiny separate label lines.
When Would You Use This Workaround?I have to confess that this is a really nasty workaround - it is very labour-intensive and fiddly. So I would advise you NOT to use this except in extreme circumstances where your credibility or job might be threatened.
Sometimes it is not worth admitting to Revit's quirky behaviour and inconsistency if it might contribute to negative perceptions of Revit in your workplace. So, do you fight Revit or fight your workmates/bosses?
Another situation that it might be worth doing is where you think there is a real risk that someone might dig a 3 metre hole on site when they misread a 6 for a 9 !!!
There is another possible solution that may avoid confusion, even if it does not placate the boss: Try making the label text underlined - that generally makes it obvious that it is upside-down, even if it looks horrible.