To open configruation for kcalc press :kbd:`Control+Shift+ +` or :menuselection:`Settings --> Configure Kcalc`. To change the maximum number of digits change the :guilabel:`Maximum number of digits` field. To have kcalc set decimal precision to only a certain number of places after the decimal place check the :guilabel:`Set decimal precision` checkbox and select the number of digits after the decimal place. If you ant to show the result in the window title check the :guilabel:`Show result in window title` checkbox.
To cancel and not apply your changes press the :guilabel:`Cancel` button along the bottom. To apply your changes and not exit from this window press the :guilabel:`Apply` button. To restore the settings to your defaults press the :guilabel:`Restore Defaults`. To apply your changes if any and close this window press the :guilabel:`OK` button.
The :guilabel:`Font` tab has settings to change settings with your fonts. To choose the font for your buttons on your calculator :guilabel:`Button font` and press the :guilabel:`Choose` button to the font for the buttons on your calculator. To change the font for the diplay of the calculator. :guilabel:`Display font` will change how the and the :guilabel:`Choose` button
The :guilabel:`Colors` tab has the colors of your user interface. To change your foreground color will change how the display or the number in the interface is the color next to :guilabel:`Foreground` color area to select. To change the background color of your display choose a different color on :guilabel:`background` button. To change the background color of the function buttons press the button next to :guilabel:`Functions`. To a change the color of the function button press button next to :guilabel:`Statisical functions`. To change the background color for hexidecimal functions :guilabel:`Hexadecimals`. To change the backgrounds of the numbers buttons press the button next to :guilabel:`Numbers`. To change the background of the memory keys press the button next to :guilabel:`memory`. To change the background of operations press the button next to :guilabel:`Operations`.
