DisplayCAL

First, let me say that I highly apreciate your job. The result is really usefull and well done.

I use in particular the “Profile information” function to compare icc profiles.
3D representation is nice, but I find it more artistic than precise. So I use the 2D view, most of time with L*a*b* coordinates.
Actually, the a*b* graph is for a fixed L* value (50 with a 0-100 scale ?)

My proposal is to add a way (window or better cursor) for the user to set up the L* value. This will give the possibility to compare incidence of using a profile or another depending on the lightness.