What exactly means "could not"?
Anyway, I think you would be better off asking in the inDesign forum.
Moving this discussion to the InDesign forum.
Can you describe what you are trying to do to set the page size and what isn't working about it?
I had just downloaded InDesign6 and tried to start a new book in it.
As usual I tried to set a page size, say 240 x 180 mm with suitable margins,
but InDesign6 simply presented me with another size with no margins.
I was extremely busy so I reverted to CS5.5 and have stayed with it for the last hew weeks.
Now I have a bit more time I'm looking at CS6 again. I think it must have been corrupted
in the download and I probably need to delete it and download again.
But I am rather disillusioned with Creative Cloud and think I might do better to get
the InDesign package on a disk, upgrading from CS5.5 to 6.
What's the best and most economic way to do this?
You can buy an upgrade package from resellers, or you can download it from Adobe.com