What do you mean by "cursors"? The "<", ">" keys in a graph window move back and forward in time, as do the left and right arrow keys. At least on my Mac at this moment.> However, the graph window must have "focus". I personally use the following in my .cshrc file:
defaults write com.apple.x11 no_quit_alert -bool true
defaults write com.apple.x11 wm_ffm -bool true
defaults write com.apple.x11 wm_click_through -bool true
The first disables the "are you really sure you want to quit X11?" message, which I dislike intensely. The second makes X11 windows obey "focus follows mouse", rather than the usual Mac "click to focus". The third means that when you click in an X11 window to give X11 and the window focus, that click will also be passed through to the program to take action with.
Zorkon the Cursed