You can add corner rounds to both inside and outside corners, and you can create fillets or rounds of different sizes in a single operation.
All fillets and rounds created in a single operation are one feature.
On the ribbon, click Sheet Metal tabModify panelCorner Round .
In the Radius drop-down list, specify the radius for a selected set of corners. Click to change a radius, and then enter a new value.
In Select Mode, click Corner or Feature:
Corner. Selects or removes single corners.
Feature. Selects or removes all corners of a feature, except the corners that result from intersections between the feature and other sheet metal faces.
In the graphics window, select model edges that represent corners.
To add rounds with a different radius, select another set of edges.