Synchronisation of parameters between \begin and \end [duplicate]

If I create a new object that requires

\begin{}


and

\end{}


I want the contents within the braces to auto-synchronise with each other.

For example

\begin{itemize}
\item Example text
\end{itemize}


And later I decide that I want an enumerated list, and I change one of the contents inside the { } to enumerate the other one should too automatically.

\begin{enumerate}
\item Example text

% Contents of {} should update here automatically if changed above
% Or vice versa
\end{enumerate}


This 'auto-synchronization' sometimes occurs accidentally so I think it is an inbuilt feature, but I do not know how to trigger it.

Edit

This answer by @Troy also explains this issue and he has used better terminology (mirroring vs auto-synchronisation). However, in that answer, the information by @Troy was additional and not what the OP was asking for.

marked as duplicate by gusbrs, user36296, Zarko, dexteritas, Phelype OleinikJun 20 '18 at 16:50

• Once you place your cursor in one of the fields (e.g. itemize, \begin or \end) it takes a couple of seconds until TeXstudio turns them into placeholders (you'll then see a box around both of them). Once this is done, edition takes place in both of them simultaneously. – gusbrs Jun 20 '18 at 11:42
TeXstudio recognizes both ends of environments for simultaneous edition, but has a time lag in doing so. In order to trigger it, you should place your cursor in one of the fields (e.g. itemize, \begin or \end) and wait a couple of seconds. After this time lag, TeXstudio turns them into placeholders (you'll then see a box around both of them). Once this is done, edition then takes place in both of them simultaneously.