Having typed a user-created function's name I would like to be able to see either the concise syntax dropdown available for inbuilt functions (shown below left) or alternatively to be able to see the user-created function's template with Edit > Make Template (shown below right), as one can also see for inbuilt functions.

Syntax dropdown. Function template.

All I really want to see are the names of the function argument variable names so I know what to provide and in which order without having to scroll up/down to find the function definition and avoid getting RSI!

Do I have to write documentation for my functions to enable this or can Mathematica show me the argument variable names I have written in the function definition?

(Apologies if this is trivial/has been answered already, I have looked for an answer for quite a while but probably don't know the right keywords to search for.)


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