I thought there was a way to align the section box to a plane but I forgot how. Can anyone help me out? Thanks!
No, you cannot use align option to align the section box with a plane, but by using rotate option you can get close to what you want,
1)First Draw two reference plane in any of the floor plan, one inline with the section box and other inline with the face/wall/plane as you want.
2)Open 3D view, click on the section box then change the view to that floor plan in which you drew the reference plane.
3) Click on the rotate option (don't worry the section box will disappear but, you can still rotate it) now snap the "Center of Rotation" to the intersection of the reference planes (as shown in img) next thing rotate to the required reference plane.
Why god does it have to be this complicated. I just want to align my section box to my rotated view. I sometimes feel like Revit is an elaborate form of torture being exacted on us unsuspecting guinea pigs. please just understand that sometimes we would like to rotate section boxes with precision. Is it too much to ask?