This video from Teledyne LeCroy High Definition Oscilloscopes demonstrates that confirming how a switched-mode power circuit is performing, improving its efficiency, or determining the power supply's response to transient load conditions is best accomplished through the Power Analyzer software option.
Teledyne LeCroy Power Analyzer software uniquely presents a color-coded overlay that identifies the turn-on, turn-off and conduction losses of a power waveform, directly on top of this waveform.