Dug duggud

Nubee here so i apologise upfront if i don't get the tekkie data correct. Before i cut out a highlighted section i wanna hear it first to make sure i have the bit. When i hit the play button it starts from the beginning of the track and not the highlighted section. I have checked the help files but can't find anything that helps. Can someone point me in the right direction? Many thanx Dug