Change your pads to Annular pads instead of round, and define the opening in the center you wish.
That is the best way to do it: "Annular lets you specify an inner pad diameter, bringing the inner diameter of the pad inside the drill outline. A pilot dimple at the center of the copper pad appears as an aid to hand fabrication of some prototypes."
In a pinch you can change your D-codes from circular to annular on the 'Photo Plotter Setup' page. You'll lose that work if someone hits 'regenerate' though.
Thanks for your reply,
but what is the use of the open copper (inticated in Red) as i shown in picture. ??
From the Layout User's Guide and Reference Manual - Open copper (a path drawn with copper) is interpreted as a trace.