Everyone has there own preferences when it comes to interface design and this is why there are so many customisation options in Windows. You can change colours, themes and more. One personal irritation is the thickness of window borders. They don't need to be as thick as they are and it is simply wasted space. In Windows 7 there was a dialog in which you could customise the title bar, icon sizes and window border width, but it's a mystery where it has gone to in Windows 8. Fortunately, it can still be changed with a registry hack. Here's how to slim down those window borders.
Go to the desktop and press the Windows key and R at the same time. This displayed the Run box and entering
regedit starts the registry editor. In the left-hand panel go to HKEY_CURRENT_USER \Control Panel \Desktop \WindowMetrics. On the right is a value called PaddedBorderWidth and this is the extra width added to window borders. The default value is -60. Double click it and set it to zero. Quit the registry editor and restart Windows.
If you go back to the desktop and open a window, such as Explorer, you will see that the borders are much thinner than before. This means more screen space for the window contents. Although we set the PaddedBorderWidth to zero, the window borders are not zero. It just removes surplus padding. You may find the thin borders prefereable to the chunky ones that are the default.