Align Origin to Face Normal

Moves the object's origin to the active face and turns the object's local axes to match it: Z points along the face normal, X follows the face's longest edge. Handy when you want an object's transform to sit on a surface so later moves, scales and child objects follow that surface. Edit Mesh mode.

Hotkey: Alt+F5 in Edit Mesh.

Tips

• Click a face last so it becomes the active face before running.
• The 3D cursor is moved to the face as part of the operation.
• Any rotation on the object is applied into the mesh first, so running it repeatedly gives a stable result.