Shading ink doesn't work?

[Baudisch (Pardall)]

I'm trying to use the shading ink, but after I select the colors I can't draw anything, the cursor doesn't paint.

GIF showing it (don't mind the name, that's gfycat's fault :P) https://zippy.gfycat.com/SneakyPaltryAfricanelephant.gif

[Enginya]

Shading ink only works above colors selected for shading. So you have to first draw something using one of those colors and then use shading ink over it. And you have to use Right Mouse Button to make it paint with next color and Left Mouse Button to paint with previous color. Don't know why, it's not really logical. There's "Reverse shade" option hidden under small black triangle to the left of selected shading colors to "reverse" behaviour.

Also you can setup hot keys to switch between ink types in Edit -> Keyboard Shortcuts...-> Commands -> scroll down to Set Ink... commands list

[gekobal]

I find that Shading function a bit unintuitive. I want to switch between those colors without drawing on the artwork first, and then draw. But if i am not wrong, it doesn't allow that.