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### Keyboard Accelerators

Note that in line 2-3 of program 2-2, we have indicated the keyboard accelerators for the two pages using the `-underline` option. The value of this option is the position of the character to be underlined in the string, where zero represents the first character. When the user presses `$<$Alt-N$>$` or `$<$Meta-N$>$` the ``Network'' page will be activated; on the other hand, if he presses `$<$Alt-H$>$` or `$<$Meta-H$>$` the ``Hard Disk'' page will be activated. The TixNoteBook widget will automatically create the keyboard bindings for these accelerators for us, in a way similar to what the menu widget does, so there is no need to set the keyboard bindings ourself.