where is the button set for restructured-text files (editor only, split view, preview only)

Ahoi,

i recently updated my Pycharm version and can not find a set of the buttons of previous versions.

Now i am looking where this feature is, either by button or by shortcut and i hope someone can help me with my maybe trivial question.

The button set im talking about is the following, allowing me to edit what is viewed in the editor (editor only, split view, preview only)

https://www.jetbrains.com/help/pycharm/restructured-text.html

Maybe im just terrible at looking for it on the internet, the keymap and the action search, but i could not find/identify it.

This the my POV with my recently downloaded version.

Cheers