Hi,

I somehow managed to (unintentionally) populate the whole - I mean from
bottom to top, from left to right, over million rows) sheet with
borders. I don't know how it happened, so I couldn't figure some smart
way to get rid of them (it surprised me when I opened the file the next
day), so I manually erased them.
The consequence is - the sheet became huge!
It's version 2007 and I don't have experience with this version.
How can I make the sheet 'normal'?

Thank you.