First, open "Programs → Accessories → Auxiliary Tools → Auxiliary Wizard" from the "Start" menu.

In the pop-up accessibility wizard, click Next to enter the setting of text size, select the item "Use common text size in Windows", and then click Next. When entering the display setting interface, select the item "Change font size", leave the other items unchecked, and then click the "Next" button.

When entering the "Set Wizard Options" interface, uncheck all options and click the "Next" button directly, then click the "Next" button directly in the "Unselected Options" interface and click the "Finish" button to complete the setting of the accessibility wizard.

Usually, after opening the accessibility wizard, you can always click the Next button and select its default value to complete the setup. When finished, you can find that the title bar of the Windows XP-style window theme has narrowed.