Corner Seam Dialog Reference
Define the corner seams you add to sheet metal faces.
Access
Ribbon: Sheet Metal tab 
Modify panel Corner Seam 
Shape
Controls the shape, gap measurement method, overlap type, and gap parameters for the corner seam.
Shape
Selects model edges and specifies whether to rip corners.
Corner Seam
Specifies new corner geometry between existing coplanar or intersecting sheet metal faces.
Corner Rip
Specifies a ripped corner. Use this option to open a square corner to create a sheet metal corner seam (typically on a converted part model).
Edges
Selects a model edge on each face.
Miter/Seam
Labeled Miter when the edges selected are on coplanar face, and labeled Seam when the edges selected are on nonplanar faces. The controls include:
- gap measurement method used
- seam gap overlap type
- gap distance value
- percentage of overlap (if needed)
Maximum Gap Distance
Use this option to create a corner seam gap that can be measured in a manner consistent with the use of a physical inspection gage.
Face/Edge Distance
Create a corner seam gap that can be measured from the face next to the first edge selected to the second selected edge. These corner seams are consistent with the seams produced by releases of Inventor before R2008.
Overlap Option
45 Degrees
(coplanar selections/maximum gap distance) Applies the Symmetric Gap seam type to the selected corner seam.
Symmetric Gap
(coplanar selections/face/edge distance) Applies the Symmetric Gap seam type to the selected corner seam.
Symmetric Gap
(nonplanar selections/maximum gap distance) Applies the Symmetric Gap seam type to the selected corner seam.
No Overlap
(nonplanar selections/face/edge distance) Applies the No Overlap seam type to the selected corner seam.
Overlap
(coplanar selections/maximum gap distance) Applies the Overlap seam type to the selected corner seam.
Overlap
(coplanar selections/face/edge distance) Applies the Overlap seam type to the selected corner seam.
Overlap
(nonplanar selections/maximum gap distance) Applies the Overlap seam type to the selected corner seam.
Overlap
(nonplanar selections/face/edge distance) Applies the Overlap seam type to the selected corner seam.
Reverse Overlap
(coplanar selections/maximum gap distance) Applies the Reverse Overlap seam type to the selected corner seam.
Reverse Overlap
(coplanar selections/face/edge distance) Applies the Reverse Overlap seam type to the selected corner seam.
Reverse Overlap
(nonplanar selections/maximum gap distance) Applies the Reverse Overlap seam type to the selected corner seam.
Reverse Overlap
(nonplanar selections/face/edge distance) Applies the Reverse Overlap seam type to the selected corner seam.
Percent Overlap
Specifies the overlap as a percentage of the flange thickness using a decimal value ranging from 0 to 1. This option is valid when the overlap type is specified to be: overlap or reverse overlap.
Gap
Gap Specifies the distance between the edges (or between a face and an edge) of the corner seam. Enter a value if it is different from the default.
Thickness The value specified in the active Sheet Metal Style. If the value was previously edited, you can reset it to the parameter defined in the sheet metal style. You can also use the options on the drop-down list to:
- Measure a feature distance to use for this value.
- Show Dimensions to identify a dimension to use for this value
- List Parameters that you would substitute for this value or reset the value to the Feature Value if the value was previously changed
(More) 
Extend Corner
Specifies how the corner is extended.
Aligned
Projects the first face so that it aligns with the second face.
Perpendicular
Projects the first face perpendicular to the second face
Bend tab
For information about the Bend tab, see the sheet metal bend options reference.
Corner tab
For information about the Corner tab, see the sheet metal corner options reference.