Thanks.
In PC I meant Windows that is Microsoft Office in Windows.
The option you described in OpenOffice in MAC is what I used and gave the result I described which is not very useful. At least for my purposes.

I have received a document from an editor and I want to compare it with the document I initially sent him so to review the changes he had made. When I used the "Compare Document" in the Edit menu of NeoOffice I got a file that begin with 21 pages of the first document and then 21 pages of the second ...

and of course, I tried to use the disk utility and it failed to create an image.
Thanks

Thanks.
That's a progress for me.
However the current DVD is not a data DVD. It's not a movie either although when I slide it into the computer DVD Player plays it. It accompanies a language study book.

Hi,
I am new to Mac. I have three DVDs which I want to burn on empty DVDs. After inserting one of the original DVDs and trying to burn it I got immediately a message asking me to insert an empty DVD. For that purpose I had to take out the original which then is not available when the empty one is ...