2011

If you select a 3D solid, you can select multiple edges, but you must select the
edges individually.
Enter fillet radius <current>: Specify a distance or press Enter
Select an edge or [Chain/Radius]: Select edge(s), enter c, or enter r
Edge
Selects a single edge. You can continue to select single edges until you press
Enter.
If you select three or more edges that converge at a vertex to form the corner
of a box, FILLET computes a vertex blend that is part of a sphere if the three
incident fillets have the same radii.
Chain
Changes from selection of single edges to selection of sequential tangent edges,
called a chain selection.
Edge Chain Selects a tangential sequence of edges when you select a single
edge. For example, if you select an edge on the top of a 3D solid box, FILLET
also selects the other tangential edges on the top.
FILLET | 431