Solids
Example:
If you select faces, Fill deletes them and extends neighboring faces:
If you select a chamfer or round, Fill removes them and adds them to a named
group:
If you select rounds with neighboring rounds, Fill creates planar caps
(because rounds should not be extended by definition):
If you select rounds on shelled parts, both faces of the shell are
filled:
If you select joint edges created in Sheet Metal, the joints are
removed:
If you select two imprinted edges, as shown below, they are combined into one
edge:
