Set/Restore viewport

 From:  Michael Gibson
2891.11 In reply to 2891.10 
Hi Mike, I've updated the scripts above (all 3 of them) so that they should now work ok with v3. There is a slight difference with how 'null' in script is interpreted between v2 and v3.

The updated ones should now work in both v2 and v3, at least I think so. Please let me know if you still see any problems with them.

- Michael