Model answers are edited directly on each individual question in Prepare mode. See Question and content types to learn how to create and edit model answers for each type of question.
The option to print model answers or save them to PDF is only available to teachers. Students cannot print or access model answers from their accounts unless you release answers and feedback.
Open the Session in Prepare mode;
Click the Print button in the upper right corner;
Select Print model answers;
Use your browser's print dialogue to print the answers or save them as a PDF.
See Save Sessions for print and offline use for more on printing options in Stile.