Locking Preference Settings
Most preferences panes include a lock button that enables you to lock the settings. Locking a preferences pane’s settings prevent them from being changed accidentally or by users who do not have administrative privileges.
To lock a preferences pane
Click the lock button at the bottom of a preferences pane window (Figure 123).
Figure 123. When a preferences pane is unlocked, the padlock icon at the bottom of its window looks unlocked.
The button changes so that the icon within it looks like a locked padlock (Figure 124).
Figure 124. When a preferences pane is locked, the padlock icon at the bottom of its window ...
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