The L10 provides four different display modes in playback, press the DISPLAY button to cycle through them. You can have blinking highlights (this in an option you have to turn on in the setup menu) and RGB histograms and the usual array of shooting information.
Turn the command dial clockwise to enter magnify mode, keep turning to magnify up to 16x. Use the four way controller to pan around the magnified image. It does appear to us that beyond 8x you aren't actually seeing any more detail.
Turn the command dial counter-clockwise to switch to thumbnail index views, there are three different index views; 9 images (3x3), 25 images (5x5) and a useful calendar view which allows you to browse your images by the date they were taken.