"I click Print..."
Does that mean you have a button on your layout that you click to print these certificates?
Paper orientation is controlled in Printer Setup so you can select paper orientation there, but if you are clicking a layout button, its script may use printer setup to select different settings and override the choices you make. If so, the script should be updated to use your printer setup settings.
If you pull up your records on your certificate layout and enter preview mode, what do you see? (And you can select print setup while in preview mode to change these settings.)
Thanks for yur reply, it led me down a different path when you mentioned the script settings override. The size needed to be adjusted to 97%
from 100% for scaling as the graphic being used was a hair too big to fit 2 on a letter size portrait. Simple things always are the hardest to find.