Dear Sir, You can select the paper size in CADian as followings. 1, Execute plot command. 2. Press print setup from the Plot window in below. 3. Select the Printer to be used from the Plot Window. 4. Select and check the Paper size from the Plot Window. Paper size can be supported by printer. It""s independent with CADian. If you can""t find the paper size for A0, then reinstall the print drive. If your problem is still continued, set the printing area by window seclction, and do as followings. Please capture and send the screen as below 3 types. 1. print window > advance > ""print offset"" 2. print window > scale/view > ""print scale"" 3. print window > ""print preview"" after set above 1 and 2. If it is displayed normally in the print preview, then it regards as the problem of printer drive program.