This is a more advanced tool, compared to Xdrakres, since Xdrakres only allows to change the resolution and depth. XFDrake offers a menu to even modify the screen or video card in use. In fact, Xdrakres is only one of the options proposed through XFDrake.
This option will display a tree with all major monitor brands and models. First expand the branch corresponding to your monitor brand, then choose in it the model you are using.
Same principle, choose your brand and video card model.
This choice simply opens Xdrakres: Change the resolution of your display.
When clicking on this choice, the program will try many resolutions on your display. That is why you will see it blinking various times. Then it'll display the Xdrakres main window figure 11-3 with all acceptable modes on your specific system.
This is a simple window summing up the current hardware choices,
It is recommended that you make a final test of your configuration before closing XFDrake; this will ensure you'll have no problem when rebooting the graphical server.