I added a cylinder object to my model and changed the object type from normal to "Print as support." After slicing, the cylinder appears as support but this support exists in areas where there is no normal model (it's just supporting air).
This article How to Add Manual Support in Cura states:
Cura offers a selection to "print as support". That will print the whole cube as support. We just want the area under the leg within the cube. So choose that setting from the drop down menu.
The article doesn't clearly state what that setting is and Cura 5.4.0 has no drop down menu. How do I get the support associated with this print-as-support cylinder to be generated for only those areas that are below the normal model?