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The initial focus in a dialog box is generally placed on the control in the upper left area. From there, you can access other controls in the dialog box by pressing the Tab key. Alternatively, you can use the dialog box keyboard shortcuts listed below.
The placement of a control in the tabbing order is determined by the section it belongs to, the type of control it is, and its placement in the dialog box. Note that some dialog boxes may not have all types of controls or the same number of controls.
For dialog boxes containing more than one user interface tab (the Options dialog box, for example), the initial focus is generally placed on the first tab itself. Use the key combination Ctrl+Tab to navigate to other tabs. Press the Tab key to navigate through the controls on each tab.