How do I read the names of functions and their signature from a imported .jl file?

[jzr]

Similar question to

What is the command to find the keywords/functions of a Package such as in CSV.jl or Unitful.jl?

Greetings; As shown in the attachment, I tried to use names, names! and I tried [SHIFT]? to find keywords/functions . What is the correct keyword or script to view all keywords and their “docstrings” ? As shown in the top half of the attachment, I am guessing and researching online what units of measurements are valid. By the way, I am using Replit.com and it has Julia 1.3. [chrome_dfz3KRAhnL]