[ferret_users] ppl disables palette?

[Haoping Yang <Haoping.Yang@xxxxxxxx>]

Dear ferreters,

I have a very basic question with ppl. For example, to get a 2d plot of 
ice coverage. I did:
yes? ......
yes? shade/palette=ocean_blue ice_coverage   ! ice_coverage is the 
variable name, I want the color scheme to be "ocean_blue"
yes? ppl title ice coverage                                 ! change the 
title to "ice coverage"
yes? ppl shade
However, I got a plot with the default colors. The "ocean_blue" 
disappeared. Anything wrong?

Thanks,
Haoping