Page Layout ⇒ Different margins for sections and subsections

[wongearth]

Dear All,

I have been searching everywhere but have not found any solution. I would like to set different left margins for content in chapters, sections and subsections (see fig.). Just wondering if there is a package that does this automatically. I know that package there is package changepage that uses command \begin{adjustwidth} but I have to do this manually which is not what I keen to do. If you know the package or the code to do it. Please help. Thanks.

[Johannes_B]

From the top of my head, KOMA has the environment addmargin which you can use to define new sectioning commands, or redefine the old ones. I don't have time to setup a test document.
Hint: If you'd have prepared a minimal working example, you probably would have a solution by now.