I want to extend a surface (3faces), but I don't want all edges to be extended just the one at the bottom/top. I am a beginner in SW, so I am not sure if there is a way I can do this using "Extend Surface". Can someone suggest a workaround or a way to achieve it using extend surface? The part is shown here and the surface I am trying to extend is Surface-offset-BackBase https://utexas.box.com/s/s8h5e49yes1g4xmltlyv
I want the bottom edge to be extended baseplane back for this surface.