Just for info, linux users this can do this by adding (as root): Option "NoFlip" "True" to the device section of your /etc/X11/xorg.conf or /etc/X11/XF86Config file. Cheers Andy On Wed, 2005-06-29 at 23:31, Borlan Pan wrote: > A while back there was a bug reported on "rulers blatting canvas" using > the NVidia libraries on Quadro cards where the black cursor lines did > not get erased. No solution has apparently been reported. > > The problem seems to be in the OpenGL "flipping" option which only > applies to Quadro cards. > > This can be turned off by running the "nvidia-settings" interface and > unchecking the "Allow Flipping" option. > > Borlan -- Dr Andy Herbert Department of Chemistry University of Edinburgh West Mains Road Edinburgh UK EH9 3JJ Tel: +44 (0)131 650 4704 or 650 7372 Email: [log in to unmask]