How to select and copy text in a pdf?

[David AHutchison]

I've tried Adobe PDF viewer and WPS office. In both cases, PDF files seem to be quite inert to any user interaction. Long-press in Adobe allows me to add text notes, but that's it.
Is it hidden somewhere, or is there an app that lets me select and copy PDF text?

 

[RogMoore]

Try Nitro Pdf, it may help you.