In Acrobat one has a text tool (a funny vertical bar rather like an I) which one places at the beginning of the chosen text and drags over to the end of the part one wants to grab. This highlights the selected text.
Insofar as I can determine there is no equivalent. The "text tool" (capital T) is supposed to be put over the text and clicked once and it selects it - but it seems to choose a random bit of text and not to not allow me to make the choice.
What am I doing wrong?

Thanks Richard