Today I was trying to use OS X Mail via Parallels access. I could not reliably get the inner panes, such as the list of headers (Legacy mode) or the email viewer. Most of the times attempt to scroll would scroll the entire desktop. Or move the Mail app on the desktop. Once in a while the headers would scroll or the email in the viewer, but I could not tell how to reliably switch. So the whoe thing is pretty useless without this ability. Not only could I not find out how to scroll inside panes, but could not find any help in the tutorial or online about it.