Figure 3.16 - Connecting two edges
The F key is a great tool to create new geometry based on connections
of elements from a Mesh.
3.4.1 Connecting faces with the Bridge faces
The F key can connect the vertices and edges of a model, but won't
work when the selected element is a face. To connect faces in a model,
we have to use another tool. For faces, we need the Bridge Faces that
appears in the Context Menu. After selecting two faces, use a right-click
to open that menu (Figure 3.17).