screen shot with 2 fingers rather then the hand

[Niharika98]

Screenshot with 2 fingers 

[CrazyBoy28]

Check out this

[Sidhabhi]

You can try Accessibility>Interaction and Dexterity>Assistant menu feature

[Sidhabhi]

Or go for Samsung one hand operation+

http://apps.samsung.com/appquery/appDetail.as?appId=com.samsung.android.sidegesturepad