Do not forget to select the correct check style.
Again, AFAIK, the WF printer does not support partial pages. You will have to use form leaders to feed your printer with a proper 8.5x11 sheet while printing a partial 1- or 2-checks page of Wallet or Standard checks in normal portrait orientation.
See https://intuitmarket.intuit.com/fsg/businesschecks/formleaders.aspx for an example of form leaders. Check your local office supply store, search on the Internet or order from Intuit.