Folowing Yorik's "Freecad A Manual" example, I tried the DXF import. Being unable to find a way to "lassoo" the resulting "cooktop" (hob) objects, I tried creating a group. This might work using the "Move" tool, but here a simple "mouse drag" would be quicker.
Should I ammend the import options, eg. "Join Geometry" to follow this example? The example text simply says
"Insert the two DXF files, and move them to a suitable location on the tabletop"