I notice that hidden settings of the Alt+Tab dialog in Windows 8 are different from Windows 7. E.g. Microsoft has removed Columns/Rows and Fade effect settings, but added Focus Width.

With Alt Tab Tuner VIII you will able to change the following settings of Alt+Tab dialog:
  • size of the thumbnails
  • horizontal spacing between the thumbnails
  • vertical spacing between the thumbnails
  • top, left, right and bottom margins of thumbnail
  • icon size and position relative to the thumbnail
  • window title text offset
  • width of the focus border

Alt Tab Tuner VIII is compatible with Windows 8 x86 and Windows x64. This is portable software and does not require to be installed.

Download Alt Tab Tuner VIII