Version: (using KDE 4.1.3) OS: Linux Installed from: Ubuntu Packages One should be able to create a reference point on the plot via a mouseclick. Once set, when the pointer is moving around the plot, then besides the X and Y-value which is shown in the statusbar (X, Y) it then also shows the difference between the Y-value of the reference point, and the actual Y-value of the current pointer. In other words, once a reference point set on the plot, when moving over the plot, at all times, the status bar should be showing (X, Y, Yref - Y). I guess it shouldn't be too hard to implement, but o so handy (at least for me)
The desired functionality already exists. The 'c' key can be used to create the reference point. SHIFT+'c' destroys the reference point. It was decided not to use a mouse button for this functionality as they are already overloaded with existing functionality.
Andrew, Thanks a lot. I'm using version 1.6.0, but I couldn't find this functionality. Not on the main menu, the context-menu, not even in the list of shortcuts, unless I'm really looking over it. Anyway, I'm glad it exists and it works!!