I can't figure out why my limit contour range tool is not working. when I turn it off I can see all of the minor ones but then when I try to set a range they all disappear. Please advise, thanks!

This option is applied during the map generation process, and is really just a way of speeding up map gen if you only need a certain subset of minor contours (creating contours is expensive, so if you can avoid doing it the map can generate more quickly). You need to set a min and max depth value, and minor contours will then only be generated across this specified range. You can turn the display of the generated contours on and off using the layers tab.

Strange, i just shut it down and restarted it and now it's working. Another question, for the bottom composition scale, I assume the "Less" means less hard and "more" means more hard. Is there any ballparks for sediment or weed depth to tie to this scale?