Creating Chamfers

	This task shows how to create one or more chamfer(s) on a Sheet Metal part, that is to cut off, or fill in sharp edges of Sheet Metal parts. This chamfer creation operation can be performed indifferently on the folded or unfolded view, and only one support (i.e. the chamfer when previewed should not lie over two supports).
	Open the Corners1.CATPart document.
	Click the `Chamfer` icon . The Chamfer Definition dialog box is displayed.
	Choose the chamfer `Type`: `Thickness chamfer` : to be able to select edges that represent the thickness of the part
	`Welding chamfer` : to be able to select edges that represent the area of the part where it can be welded to another part.
	With the Thickness chamfer type only, you can choose the type of edge you wish to chamfer: using the `Select All` button: all convex or concave edges, or all edges of both types any edge manually selected By default both buttons are checked, to allow the selection of any edge type whether manually or automatically. Once you have selected an edge, you can no longer modify this option, unless you cancel the selection. If you check the `Convex Edge(s)` button and you select a concave edge, a warning is issued indicating that you did not select an edge corresponding to the active type.
	Select a sharp edge on a part. The chamfer is previewed on the edge.
	As soon as you selected one edge, the dialog box is updated and the `Select All` button changes to `Cancel Selection`.
	Choose a chamfer `Mode`. You can either enter:
	a length value and an angle: the length is computed on one side of the edge and the angle from the chamfer's limit on the same side
	two lengths: these lengths are computed from the selected edge on both sides.
	You can use the Reverse button to inverse all edges' side, on which the values are taken into account; Use the arrow displayed on each edge to locally invert only one edge.
	Click `Cancel Selection` then, make sure that both `Convex Edge(s)` and `Concave Edge(s)` buttons are checked, and click the `Select All` button. All sharp edges of the part are selected, the `Select All` button taking into account the chosen type (convex, concave, or both) and the chamfers previewed.

	Click OK in the dialog box. All sharp edges of the part are cut off or filled in.

	To deselect an edge, simply click it again. For quick selection in a complex part, you can select all edges with the `Select All` button, then deselect one or two edges.
	When you select an edge that is not sharp, such as the edge between a wall and a bend for example, a warning is issued. As you select more edges, the `Edge(s)` field of the dialog box is updated. When using the `Select All` button, you select all edges (whether concave, convex, or both) present at the time. If when modifying the Sheet Metal part, new edges are created, these will not be automatically chamfered.