Click on the Print setup option at the bottom part.
Choose the Type of Checks.
For you not to waste an actual, print it on a blank paper first.
Click on View preview and print sample.
If you are satisfied with it, click on Print.
If you're unable to print or the printed sample doesn't align with the blank check, use this article for the next step. Also, how to set up adobe reader and fine-tune alignment: Align how your checks print.