You can create this combination with a Door/Window Assembly. In the Design Tool Catalog, locate the Door/Window Assembly that is the closest match to what you want, for example, PictureCtr + Casement 2-0 L&R. Before making any changes, right-click the assembly (not the individual windows) and Copy & Assign the style to a new one. That way, you keep your original style intact in your drawing if you need to start over. The infills can be replaced with a different style, and/or new infills added.