CH5M3D

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# User Interface: Keyboard and Mouse

While most common operations can be performed using only a mouse, a few operations require a combination of both keyboard and mouse. Note that these operations only work in View Mode. Note that in these descriptions, the screen is assumed to show the X-axis (horizontal) and the Y-axid (vertical), with the Z-axis coming "out" of this plane. The possible combinations and their results are outlined below.

- Selecting a blank portion of the screen:
  - Mouse only - Dragging the mouse results in rotating the molecule around the X- and Y-axes.
  - <Shift> + Mouse - Rotation will occur around the Z-axis.
  - <Ctrl> + Mouse - The molecule will be translated along the X- and Y-axes.
- Selecting a single atom:
  - Mouse only - The label for this atom is shown. (If the charges button is pressed, the calculated charge on this atom is also shown).
  - <Shift> + Mouse - The selected atom is highlighted. If this atom is already highlighted, this operation will cause the highlight to be removed.

A button is provided that will allow automatic re-scaling and re-centering of the molecule. This button will also remove all highlights from the displayed structure.