Dick, Thanks for the feedback. Auto zoom confirms that the problem is in the board design, not caused by the gerber output. After I auto zoom, the pcb shrink to a few pixels and a cursor shows up about a third of the screen away from the upper right. The zoom level and coordinates shown on the bottom of the screen are: Z 47953 X 2958.0000 Y 4.05. I can't see anything onscreen other than the pcb. I tried to do a block delete of whatever might be invisible other than the pcb, but this seems to have no effect. Any ideas on how to clear this up?
Doug