You use Face to create a face from a sketched profile. (You can use a shared sketch as a profile.)
The sketch shape and any bends or seams between a new sheet metal face and existing sheet metal faces control the shape. If desired, you can use a shared sketch as a profile for a face.
You can also override default sheet metal styles in the Face property panel as you create your sheet metal face. These settings include how the flat pattern unfolds, and the bend relief settings between faces.
Add thickness to a sketch profile to create a sheet metal face. The following illustrates creation of a base feature and a separate solid sheet metal face.

Create panel
Face
Default: The face thickness direction is set by the software.
Flipped: Directs the material thickness to the other side of the selected profile.
Symmetric: Offsets the material thickness equally to both sides of the selected profile.
Join: The new face becomes part of the selected solid.
New Solid: Creates a new solid separate from the others.
Apply if you want to create more sheet metal faces.
The Sheet Metal Property panel displays additional parameters when adding face features to existing sheet metal features. Single bends are created by default when you use the Face command.
Create panel
Face
Default: The face thickness direction is set by the software.
Flipped: Directs the material thickness to the other side of the selected profile.
Symmetric: Offsets the material thickness equally to both sides of the selected profile.
Join. The new face becomes part of the selected solid.
Match Shape: Extends the shape of the existing and/or new faces along the side edges as needed to satisfy the selected options.
Uniform: Extends the shape of the new face to satisfy the selected options.
Fix Edges
Full Radius
45 Degree
90 Degree
Flip Fixed Edges: Click to trim or extend the selected edge while the matched edge is fixed. When not selected, the order is reversed.
The following image depicts the various Output options.

Initializes with the preset defaults. You can use custom rules you create or enter a value to override the rule.
Default (Straight)
Tear
Round
Straight
Default (None)
None
Intersection
Straight Line
Arc
Trim to Bend
Apply if you want to create more sheet metal faces.