• Use the Flat Pattern Preview window to temporarily display the part in an unbent condition. Do not add unnecessary pairs of unbend and bend back features; they inflate the part size and might cause problems during regeneration.

• If you specifically want to create features in a flattened state you should add an unbend feature. Create the features you need in the unbent state and then add a bend back feature. Do not delete the unbend feature in this case since features that reference the unbend feature might fail during regeneration.

• If you want a projected datum curve to follow a sheet metal bend, project the curve after creating an unbend feature. The curve will follow the sheet metal surface when you bend back the sheet metal wall.