Wow, didn't expect to see so many discussions in just one day~ I have several notebooks, each given editing privileges to various number of friends, some friends of course would overlap. But so far no more than 5 people would be sharing/editing any given notebook. @Frank.dg yes, I thought it can't be done because I didn't find anywhere that says I can. After seeing your comment, I've borrowed a Free account from a friend of mine, but as I pressed my right-key when pointing to a notebook, no sharing option could be seen, not to mention editing. Could you show me how to "give one other person editing privileges within a shared notebook"? Thanks.