Creating a Sheet Metal Hinge
- Create one of the three overlap junctions, or create a split across a flat wall.
- Select the junction where you want to place the hinge.
- Click  Hinge in the Sheet Metal tab Create group. Hinge in the Sheet Metal tab Create group.
- The Select Edges tool guide activates and the hinge highlights in preview mode to show the hinge's placement and size.
- (Optional): Modify the Hinge options in the Options panel:- Pin diameter 
- Pitch 
- Knuckle length 
- End play 
- Paint clearance 
- Hinge direction can be flipped using the Flip check box. 
 
- Click Complete to create the hinge.