Dialog Bar - Right
This is actually a special type of Control Bar which resides on the right side of the Main window. It can be turned on or off with the Dialog Bar- Right command in the Display menu. The Right-hand bar contains a list of forms, and some common commands. The Dialog Bar - Left contains another set of common controls.
The current forms are given in the list box at the top of the dialog bar. To modify a current form, double-click on an entry in the list. This brings up the Add/Revise Form dialog. To Add or Delete forms, use the buttons below the list box. If epitaxial crystals are present, the Add button will add a form to the crystal whose form is currently selected in the list box.
The Cursor Mode radio buttons control the operation of the mouse cursor.
In the Identify Faces cursor mode, clicking the left mouse button on a face brings up the Face at Cursor dialog, which provides information about the face and form. Clicking the right mouse button on an edge or corner allows insertion of a new form truncating this edge or corner and its symmetry equivalents. Only visible or front edges may be selected. The indices of the new form will be the sum of all the faces involved in the edge/corner. The alert box which asks your permission to add this form gives the indices as a raw sum (e.g. 202), but before the form is actually added the indices will be reduced by any common factor (e.g. to 101). In the case of twins, the new form will be added to all twin individuals, but in the case of epitaxial intergrowths, only the crystal which is selected will be affected. The cursor shape for this mode is a simple cross.
The Resize cursor mode allows automatic adjustment of central distances and therefore face sizes. In this mode, clicking the left button on a face will increase the central distance of the form , and cause recalculation (the current orientation will be retained). Of course, increasing the central distance generally decreases the size of the faces in the form. Clicking the right button decreases the central distance. The amount of the increase or decrease is set in the Preferences dialog in the Settings menu. Clicking on a face of a twin will cause a change in all the twin individuals. The cursor shape for this mode is a cross with arrowheads on all arms. When this mode is in effect there is a white block in the upper left corner of the graphics window saying "Resize mode off". This block is a reminder that clicking on any face will actually change the shape of the crystal, and clicking in the block will cause reversion to the Identify Faces cursor mode.
The Rotate cursor mode allows rotation of the drawing, by clicking and dragging. Clicking and dragging near the center of the plotting area causes rotation on the y and z Cartesian reference axes (see Coordinate Systems) - the effect is as if the cursor "grabs" a point on the front of the crystal. Clicking and dragging near the left or upper edges of the plotting area causes rotation on the z Cartesian reference axis, which is perpendicular to the screen. The cursor shape for this mode is a quasi-circular rotation arrow.
The Remove Symmetry button allows for distortion from ideal symmetry, by complete removal of all symmetry. Each current generated face is converted to a form, whose central distance may then be adjusted (e.g. with the Resize cursor) independently of the other faces related to this one by the original symmetry.
The Show Symmetry check box controls the display of symmetry elements (rotation axes and mirror planes), which is possible only in the 3D display mode. See 3D Parameters.
Clinographic Viewing . This turns on and off the rotations which give the standard
The Set Center button defines a new center point - use this to "focus" or "zero in" on a specific area or point in the plot. After clicking on this button, an alert box informs you that the next mouse click in the graphics window will define a new center point. After clicking on a point, the drawing will then be displaced so that that point will be at the center of the viewing area. It may be more useful to think of the result as the viewing area being centered on the point selected.
With the Rescale buttons, you can "zoom" in or out. When in the Maximize... or Universal... scaling modes, this changes the rescale factor (see Scaling). In the Fixed... mode, clicking on these buttons simply changes the fixed scale factors. The actual rescale factor applied is 1/(1+x) for down scaling, and (1+x) for up scaling, where x is the amount in the edit box converted from percent to a fraction.
The Reset Scale button calls the Reset Scaling and Centering dialog. This allows reversion to the last setttings, before interactive changes with the Set Center or Rescale buttons (above), or in the Fullscreen 3D mode.
Summary of mouse cursor operations in graphics window. For Macintosh, "Right button" is obtained with the option key plus the mouse button.
Index (Identification) mode:
Left button - identifies face and form; successive clicks give interfacial angle.
Right button - identifies edges and corners; allow addition of new form truncating face or corner.
Resizing mode:
Left button - increases central distance of form selected - usually decreases area.
Right button - decreases central distance of form selected - usually increases area.
Rotate mode:
Left button - click and drag in main part of window rotates around axes in screen; click and drag near left or upper edge rotates around axis perpendicular to screen.