If you have chosen to enable transcription on your call, after the call has finished you will see a ‘Waiting for transcription’ message. Once the transcription has been generated, click on the ‘Open’ link and the transcription will display below. Playing the call highlights the correct transcribed section on screen.
Hovering over a transcribed part of the call displays the options to play back the call from that specific point, and also to edit the transcript (see question below). The timestamp on the right hand side lets you more easily find the part of the call you are looking for.