The Rockwell B-1 Lancer is a supersonic-capable variable-sweep wing large bomber operated by the US Air Force. One of its "key features" is terrain-following radar and a fast, heavily-loaded low-altitude mission profile.
Wikipedia has a beautiful high-resolution picture of the inside of its cockpit (scaled down for SO):
Most of these controls are either items I am familiar with or are fairly self explanatory. I have a few questions about the terrain following radar, however, the controls for which are visible in the picture (and the US military is usually very good at blocking things out if they should not be visible in the picture):
This panel shows "TER FLW", which I presume means "Terrain following" and "TER AVD" ("Terrain avoidance"), both in reference to the radar. Clockwise, from left to right I infer that the switches are on/off, mode selector, priority "terrain following or map", rain rejection, terrain avoidance, "clear plane" [?] so many ft above the terrain, range (in nautical miles?), rain rejection, test button, mode selector, and "Ride", which has options of "SMH".
What do all of these mean? Is my inference correct? In particular:
Does Ride S / M / H, mean "Smooth / medium / hard", or how rapidly the plane should adjust its trajectory and thus closely follow the ground? [Hard implying the greatest degree of change]?
What do the letters A to K actually do on the mode selector dial?
Have I correctly identified everything above?
A bonus question would be "Why are there a pair of green feet" just to the left of this panel?