Choose Create, Curve, Curve on All Edges.
Curve on all edges ribbon bar
|Use this ribbon bar to create curves on all the edges of a surface, solid body, or solid face. When you are selecting all edges, you also have the option to only create curves on edges that do not share other edges (open edges).
Note: AutoCursor is unavailable during the use of this ribbon bar.
S – Select
E – Open edges
B – Break angle
F – Fit arcs and lines
P – Apply
O – OK (fixes live entity and exits function)