Use the scroll bar to view time zones that are not visible in the list. It is not available because all of the zones are visible. This is the current list of time zones. Select a time zone to modify or remove by clicking on its name, or double-click to go directly into the modify dialog box. You cannot select the Universal Time Zone because it cannot be modified or removed. To add a new time zone, you normally click this button. The button is not available because the maximum 253 time zones has been reached. To change the settings for the selected time zone, you normally click this button. The button is not available because there is no time zone selected. To delete the selected time zone from the list, you normally click this button. The button is not available because there is no time zone selected. Use the scroll bar to view time zones that are not visible in the list. To scroll one at a time, click one of the arrows. To scroll by the screenful, click in the gray area. To view a certain section of the list, drag the scroll box. To add a new time zone to the list, click this button. To change the name, offset from Universal Time, or daylight savings time settings for this time zone, click this button. To delete the selected time zone from the list, click this button. To abandon any changes you have made to the time zones and close the dialog, click this button. To save any changes you have made to the time zones and close the dialog box, click this button.