I have seen many post with similar question, but I have yet understood how to solve this problem.

I have a contour which maple creates for using command contourplot. 

The problem is that I don't know what is the value of different colors. How can I find out for example what red means?

Is there anyway we can automatically have a color bar with the proper values?

Hi,

I am using densityplot function to produce different plots of a function. The function depends on two variables q and yi .

densityplot(f, q = 0 .. 1, yi = 0 .. 1, grid = [100, 100], style = patchnogrid, color = "Red", axes = boxed, axesfont = [Times, Roman, 15], labelfont = [Times, Roman, 15])

I pass the command style = patchnogrid, but still I get these white lines which I believe are grid lines. 
In the example provided in maple tutorial, when they used this command, all gridlines were removed. Why are they not removed in my plots?

if the plot is not visible, click the link

https://www.dropbox.com/s/7xxfefv8n1arr4q/Example.jpg?dl=0