Loop Editor
The loop editor lets you adjust the loop points of any audio clip.  It is located on the Sound Details Tab.

Adjusting A Loop
The looping part of a sound is displayed in gray.  The unused parts of the sound are shown in green.  (If the sound is trimmed in the sound workspace and it is not looping, the software will show the trimmed out area in dark gray.)

Move the Start marker to adjust the start of the loop and the End marker to adjust the end.  Alternatively, you can right click on the loop editor window and choose Set As Loop Start or Set As Loop End to set a loop point.

Push the Play button to preview how your loop will sound. 

Showing Detected Beats
If you are not seeing the detected beat points, click the Show Detected Beats button.  This will show the beats in the sound.  Each beat point has tempo.  The software will not show all the beat points depending on your zoom level.  Zoom in to see more detail and beat points.  Hover your mouse over a beat point and a tool tip will show you the exact precise tempo at that time.

You can click the Zoom In or Zoom Out buttons to the left of the loop editor.  Alternatively, you can zoom in or out with the mouse wheel.

Making The Perfect Loop Tip
If the Loop Editor is displaying beat points and you drag one of the loop markers over a beat point, it will snap to the beat point to make a very precise loop. 

Setting The Snap Point
The Snap Point is the offset in a sound that is used with the Snap Settings ( by default, the Snap Point is at time 0).  For example, if you had a sound with a long introduction and you wanted the sound to snap to that first beat, you could move the snap point to the first beat.  Alternatively, you can right click on the loop editor wave form and choose Set As Snap Point to set the Snap Point. More on the setting the Snap Point.

Resetting Your Loop And Snap Point
To start over and reset your loop, simply right click on the loop editor window and choose Reset Loop And Snap.