User:Lucas Werkmeister (WMDE)/sandbox

Regarding 897905:

For Manual:Collapsible elements
Probably after “With specified collapsible part” and before “With custom toggle link”:

Custom toggle link placement
You can control where inside the collapsible element the toggle link goes by placing an element with the class  inside it. The placeholder will be completely replaced with a standard toggle link, at the exact position in the DOM where you put the placeholder. See the advanced demo for an example.

You will want to combine this with a specified collapsible part (see above), and put the placeholder outside the  element, to ensure that the toggle is still reachable in the collapsed state.

For Manual:Collapsible elements/Demo/Advanced
A fancy heading Outer collapsible content. Lorem ipsum dolor sit amet. A fancier heading Inner collapsible content. Consectetur adipiscing elit.