# Command Reference

## The File Menu

&Ctrl;Q File Quit

- Quit &kcalc;.

## The Edit Menu

&Ctrl;Z Edit Undo

- Go back in the result stack.

&Ctrl;&Shift;Z Edit Redo

- Go forward in the result stack.

&Ctrl;X Edit Cut

- Delete the displayed result and copy it to the clipboard.

&Ctrl;C Edit Copy

- Copy the displayed result to the clipboard.

&Ctrl;V Edit Paste

- Insert the cut or copied result in the display.

## The Constants Menu

Constants Mathematics

- Display Pi, Euler Number or Golden Ratio.

Constants Electromagnetism

- Display Light Speed, Elementary Charge, Impedance of Vacuum, Permeability of Vacuum or Permittivity of Vacuum.

Constants Atomic & Nuclear

- Display Planck's Constant, Elementary Charge or Fine-Structure Constant.

Constants Thermodynamics

- Display Boltzmann Constant, Atomic Mass Unit, Molar Gas Constant, Stefan-Boltzmann Constant or Avogadro's Number.

Constants Gravitation

- Display Constant of Gravitation or Earth Acceleration.

## The Settings Menu

Settings Science/Engineering Buttons

- Display science and engineering buttons.

Settings Statistic Buttons

- Display statistic buttons.

Settings Logic Buttons

- Display logic buttons.

Settings Constants Buttons

- Display constants buttons.

Settings Show Bit Edit

- Displays a bit edit field. Click on a bit to toggle it.

Settings Show All

- Display all buttons available.

Settings Hide All

- Hide all extra buttons and display only standard default buttons.

Settings Configure Shortcuts...

- Configure the keyboard shortcuts used by &kcalc;.

Settings Configure &kcalc;...

- Display the &kcalc; settings dialog.

## The Help Menu

&help.menu.documentation;