[kde-guidelines] Placement and alignment of explanations in forms

[Thomas Pfeiffer]

Howdy,
today when I reviewed a new form in KTp (see 
http://git.reviewboard.kde.org/media/uploaded/files/2013/07/28/steam1.png ) I 
noticed that the placement and alignment of the explanation for the Steam 
Guard Code seemed "wrong" to me. It felt like it should be
a) Aligned with the widget, not the label (or maybe it's aligned with the left 
edge of the form, can't tell that from the screenshot)
b) Placed below the widget it explains
I felt like the placement of supplemental text in a form was already covered 
in an HIG, but could not find any, so I think we should add it to the form 
layout HIG.
Do you think the suggested placement and alignment makes sense, or is above 
the widget and aligned to the label better?
Placing the text below the widget it explains has the advantage that users 
already know the context when they read the additional information, but the 
disadvantage that they might be confused in the period between seeing the 
widget/label and reading the supplemental text.