You may also want to look at the full parameter list of all the buttons and sliders, or at one of the general help files, Sliders, or Graphs.
MEASURING DISTANCES
Holding the left mouse button and dragging in either space creates a line, whose length and angle from the horizontal is shown above the display. A click anywhere deletes the line.
SELECTING PLANES
If the "show planes" button is selected, the origin of the reciprocal lattice is encircled in red, the reciprocal lattice point corresponding to the given (h k) is lit in green, and two of the real space lattice planes with these Miller indices are drawn. Double clicking the left mouse button (or single clicking the right mouse button*) with the cursor in the reciprocal space selects the (h k) indices of the closest reciprocal lattice point.
The (h k) indices may also be entered by typing and entering in the h- and k- display windows under the right-hand display.
ATOMIC NUMBER AND COLOR
The color of the atoms is linked to the atomic number sliders ZA and ZB for the two types of atoms.
ATOM SIZES
For convenience of display, the radii of the atoms in the real space display is three times the rA or rB parameter given in the panel.
INTENSITIES
Intensities are normalized to give a fixed brightness to the center spot. Unexpected intensity changes in response to changes in atomic numbers may be a consequence of this normalization.
*MAC BUTTONS
For a RIGHT button on the Mac, press the mouse button with the Control key down.