Here's the trick with Design Review. Try and open a .dwg file and it should come up with a message that says you need to download TrueView (90+mb program, also free) to view .dwg files. Once that's installed, you should be able to open a .dwg with Design Review and I would think you could redline it and then save a file that can be brought into your original Autocad file.
Kind of a twisted way around but, once you've installed TrueView, it's pretty much seamless.
Hope that helps,
Paul Jordan
I have to make one change on this post.. The trueview 64 bit version is 183mb, not 90+.. Well, I guess 183 is 90+ so I was kinda close..
Edited by: GrumpyGrizzly on Mar 24, 2010 9:01 PM
Hmmm.. It appears the functionality has gone away that would let you open .dwg files in Design Review after installing True View. At least I haven't found how to do it on 2010 as of yet. It looks like they want you to open the .dwg in TrueView, then save it as a .dwf, then open it in Design Review to redline it. Then you're stuck with a .dwf to send back to the office.
Actually, I can't even export a .dwg file back to a .dxf. It looks like it does it but, nothing shows up..
Edited by: GrumpyGrizzly on Mar 24, 2010 10:45 PM