How can I increase/decrease the size of maximize, minimize, close as well as other buttons in Eclipse mars IDE in Windows.

How can I increase/decrease the size of maximize, minimize, close as well as other buttons in Eclipse mars IDE in Windows.

Please use eclipse neon. This problem has been fixed in that release.
Note: scaling is controlled by zoom settings in OS display settings
Your problem is not related to IDE but your OS.Go through
Eclipse interface icons very small on high resolution screen in Windows 8.1
for solution
Right Click on eclipse application icon, select properties, in compatibility tab you must select DPI check.