How do you create this graph?

[nmail_uk]

I like the look of this graph in the release notes but I can't figure out how to create it (i.e. the lines for min, max and average with shading between.)



What options do you have to set to create something similar?

Thanks,
Andy

[richlv]

if creating custom graphs, set item to function "all".
if using simple graphs, this should be on by default as long as you choose a period that's long enough