You need to Log In on the Administrator Back end.
1)Choose the Menu to Setup 
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Menus >> yourMenu
2)Choose the Item to Modify 
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Click on the Entry to Modify
3)Set Order Parameter on Category and Posts
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Set Ordering Type for Posts
Next you need to Look at the Order Setting on Category because this Add Action Ordering.
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Set Order on Post’s Category
4)Save
Now you can provide to Manually Order your Post on “Post Manager” by the Up and Down Arrow-Triangle.
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