: Select a flat surface for the part to begin to unfold from : Select the unfold function in the command manager also in the the sheet metal tab Now you have your basic profile in sheet metal form. : Check override default parameters if you wish to adjust the thickness of your sheet metal part : Add a dimension to set the depth of your profile in this case 10mm : Select your sketch in the feature tree then in the command manager select the base flange function from the sheet metal tab. Please take note that the origin is in the center of the sketch it will help later in the tutorial. I always keep dimensions to a minimum using constraints as much as it makes life much easier when you come back to edit. Make sure your sketch is fully defined and that straight entities are tangent to arcs. A step-by-step guide on how to create the shade holder part in the lamp model shown keeping cut outs in curved surfaces straight and true for a genuine flat pattern.
