While Windows 11 allows for the customization of titlebars in some applications, it doesn't provide an option to globally change the titlebar design to mimic the Windows Vista style. However, there are ways to achieve a similar look by using third-party tools or creating custom themes.
One option is to use an application like "WindowsBlinds" by Stardock. WindowsBlinds allows you to apply different visual styles, including ones that resemble the Windows Vista titlebar. It modifies the appearance of the entire operating system, giving you more control over the design.
Another alternative is to create a custom theme using software like "UltraUXThemePatcher" or "UxStyle." These tools enable you to patch system files, allowing for the installation of third-party themes. Once you have a Vista-themed theme installed, it will alter the titlebar appearance across all applications.
Keep in mind that modifying system files and using third-party tools can potentially affect the stability and security of your operating system. Make sure to download such software from trusted sources and create system backups before making any changes.
If you decide to pursue these customization options, it may be helpful to search for Vista-inspired themes or consult dedicated Windows customization communities, as they often provide resources and step-by-step guides to assist you in achieving your desired look.
Remember to exercise caution when making any system modifications and always ensure you have a backup to revert any changes if necessary.