please provide proper documentation for observe

[rjcodedev]

Currently I am migrating from v1 to v2 but there is migration documentation. but I have managed to convert the code but there are two difficulties which I am facing.

1. not able place popver on top . below code i am using
   {
   selector: '[data-tut="reactourAddbtn"]',
   content: () => (
   <TourContentWithBtn
   message={t("tour-mssg.template-placeholder-1")}
   isChecked={handleDontShow}
   />
   ),
   position: "top",
   style: { fontSize: "13px" }
   },
2. also didn't find any proper documentation of observe. i tried highlightedSelectors and mutationObservables. but didn't able to add observe. in previous version it was very smooth but now it's hectic.

can you please help me ? I am in little hurry @elrumordelaluz