You need to Log In on the Administrator Back end.
Menus >> yourMenu
Click on the Entry to Modify
Set Ordering Type for Posts
Next you need to Look at the Order Setting on Category because this Add Action Ordering.
Set Order on Post’s Category
Now you can provide to Manually Order your Post on “Post Manager” by the Up and Down Arrow-Triangle.
How-to Remove Powered by Joomla from Site: