If a bi-fold door hangs at the side jamb on the top, what can be adjusted to fix the issue?

When a bi-fold door hangs askew or improperly on the side jamb at the top, adjusting the top pivot point is the most effective solution. The top pivot is designed to allow for vertical alignment and adjustment, which can realign the door with the frame properly. By adjusting the top pivot, you can raise or lower the door slightly, correcting any misalignment that causes the door to hang improperly.

The other options may not directly address the issue. For instance, adjusting the bottom pivot point or the side jamb hardware could cause additional complications or may not sufficiently resolve the alignment issue. Altering the door frame size is not feasible or practical in this context, as it would involve significant changes to the structure, which is typically not necessary for a simple hanging issue. Focusing on the top pivot point provides a targeted adjustment that can effectively rectify the misalignment of the bi-fold door.