Developers look at the wrong docs OFTEN. Visual differentiation would help

Background: When learning Qt, I mistook the version of Qt many times, which led to me struggling to write code because "qt creator won't recognize a property that the docs says this object has!".

And I am not alone. Other coworkers have admitted do doing the same thing often. Now that I'm on the teaching and support side, I have clients asking me "Why isn't this thing working?" when they're looking at Qt5 docs, but their app is Qt6.

And I believe this kind of thing goes as unpaid support.

I believe that this is a waste of our expensive time, of client's invaluable time, and a deterrent for anyone who tries to learn Qt on their own.

The most obvious fiend is Qt 5 and Qt 6.
Even just greying the background of Qt5 docs would probably significantly reduce the number of mistakes.

Flipping the nav bar to the right for C++ docs versus QML docs  might be an option.

Changing the main page color or font or something would help distinguish QUL docs.

I'm just going off the top of my head, but I'm sure that there are many easy fixes that would save a lot of headaches.