You can transform a linear edge into a circular shape while defining its length,
direction, and radius.
From the Advanced section of the action bar,
select the edge you want to transform into a circle and click Line to
Circle.
From the selection panel, enter the length and direction of the circle.
Note:
Click to define a radius value
and to define a custom
direction in 3D.
From the selection panel, click Create circle in opposite
direction to reverse
directions.
From the selection panel, click Create circle in normal
direction for the default direction.
From the selection bar, you can you can fillet or chamfer an edge by clicking to
fillet and to chamfer. To return to the
straight edge, click Return to edge.