原文如下：

Select atoms that became 'too small'

By default, the size of the atom displayed on the screen is proportional to its ADP or Uiso. If the atom type is wrong, and the real element is much heavier, the Ueq will become very small and therefore the displayed sphere will be too small to select by mouse. There are two solutions to this problem:

1) You can select an area that includes the atom you wish to select by drawing a box around the atom with the Shift key and the left mouse button pressed simultaneously.

2) You can switch the view to a Ball and Sticks display (View>Quick Drawing Styles) or type:

>>pers

Also use (or the GUI):

>> telp

to switch back to the view when the atoms' proportional Uiso and ADP's are displayed.

译文如下：

3.12. 选择变得“太小”的原子

默认情况下，屏幕上显示的原子大小与其ADP或Uiso成比例。若原子类型错误，并且实际上是更重的元素，Ueq将变得非常小，因此显示的球体将太小以致于无法用鼠标选择。有两种解决方案：

1)你可以通过同时按住Shift键和鼠标左键在原子周围绘制一个方框，可以选择包含要选择原子的区域。

2)你可以将视图更改为球棍模型——Balls & sticks(View>Quick Drawing Styles)或键入：

>>pers

也可使用(或GUI)

>>telp

用于切换回原子以Uiso和ADP成比例显示的视图(即椭球图——Ellipses& sticks)。

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