This sorta "depends" upon just HOW the
original .pdf file was "created"...

On the .pdf file Viewing Window -
there should be a Tool-Bar at the top -

Look for and *CLICK* on the large
Capital "T" witha lil dotted box beside it.

That Tool allows you to Left-Click (HOLD the mouse button down)
and SCROLL OVER whatever you want to "copy".
RELEASE the left mouse button when you have what you WANT "highlighted".

Now open your Word Processor program and "PASTE" everything you
have "copied" from the .pdf file window.

It Will NOT copy "graphics" - only "words".

And IF there are several columns on the original page;
depending upon HOW the original was created;
you MAY get ALL the Columns across the page .

Dunno how to NOT copy ALL the columns at once if that happens -
but SOME documents copy off just fine, ONE column at a time.

/s/ Phre