1) Start Quick Peaks gadget. Move the ROI (yellow) box to the target area of the peaks.
2) Press the small triangle button at top-right corner of ROI, and select "New Output" flyout. 
   It creates a worksheet called "QkPeak" (as hiden). 
   From the Project Explorer, double-click this worksheet to show.
3) From the flyout, select "Change Data" flyout, and choose the next plot. Then, choose 
  "New Output" flyout. 
4) Repeat the step 3) to collect all peaks in QkPeak worksheet.
5) As in the second screenshot, highlight the Peak XY columns, and move the cursor at 
   the side edge of the columns. This changes the cursor to graph-shaped. Drag-and-drop 
   it into the graph to make the peak-connected line plot.