To access the KmPlot configuration dialog, select ->. A number of settings can also be changed from options in the menu, as well.
Settings changed in the KmPlot configuration dialog become the default for KmPlot, and only take effect when a new plot is started. Settings changed in the menu take effect immediately, but do not persist after KmPlot is exited.
Here you can set global settings which automatic will be saved when you exit KmPlot. In the first tab you can set calculation-precision, angle-mode (radians and degrees), background color and zoom in and zoom out factors.
The second tab let you define you own constants. KmPlot saves the constains in the same file as KCalc does. That means you can create a constant in KmPlot, close the program and load it in KCalc and vice versa. KmPlot only supports constant names that consist one capital character and if you in KCalc define a constant name that is not one character, the name will be truncated. E.g, if you already have the constants "apple" and "bananas" in KCalc, they will be renamed to "A" and "B" in KmPlot.