If there is time recorded in a 10-minute time slot, you can bring up a dialog that shows the detail activity in the 10-minute interval. To do so, on Track Time page, you can click this icon 
to the left of a thumbnail image. Then a dialog box will pop up and show you the detail information recorded for the time slot.
The following (Figure 1) is an illustration for a detail dialog box. Important points are labeled and explained.
Figure 1