To Create a Flat Pattern Drawing View of a Sheet Metal Part
The flat pattern view is useful for fabrication, and is the only view that supports sheet metal annotations.
You can create a folded model view and a flat pattern view for a sheet metal part or iPart (The Flat Pattern option is available only if a flat pattern exists in the source file.)
The following practices apply for sheet metal parts with Model States:
When you create a drawing view for a sheet metal part, you can select an explicit Model State member on the Component tab of the Drawing View dialog.
If a flat pattern is available in the selected model state, the Flat Pattern option is enabled in the Drawing View dialog.
Note: Only one flat pattern is allowed in a file.To reference a different model state member, edit the drawing view and select the Model State member on the Component tab of the Drawing View dialog.
The following practices apply for sheet metal iParts:
- When you create a drawing view for a sheet metal iPart, you can select an explicit iPart member on the Model tab of the Drawing View dialog.
- If a flat pattern is available in an iPart member file, the Flat Pattern option is enabled in the Drawing View dialog.
- To update an out-of-date iPart member, select the member on the Model State tab of the Drawing View dialog.
- To reference a different iPart member, edit the drawing view and select the member on the Model tab of the Drawing View dialog.
Click Place Views tab
Create panel Base 
.In the Drawing View dialog box, select a sheet metal component as File.
In the Sheet Metal View area, select Flat Pattern view.
If appropriate, select or clear the selection of the Recover Punch Center option.
Set other options in the Drawing View dialog, and then click OK.