1. The ability to use very large images within a smaller window while fading between
them.
The configuration file contains these options:
controls=fader, zoom
image_window_size=800,500
filenames=1_bef.jpg, 2_aft.jpg
fader_label=Fade between gray image and green image
maximum_zoom=1.0
hotspot_color = 0x80400000
hotspot0 = 300, 400, 50, 50, pan, popup, this is the pop-up message, this is the hover-tip
no_enh=true
Note that we have also included a fader_label value. Without this, the
simple label "Set fade level" is used.