How to change the scroll navigation to static navigation at header?

In case you don't have a CSS plugin, we advise you install  Advanced CSS Editor plugin and follow the instructions. In Appearance -> Customize -> Advanced CSS Editor add the following code.

	.navbar-fixed-bottom, .navbar-fixed-top {	
	    position: absolute !important;	

Note: If you are using WordPress 4.7 or later you could add the code  Admin > Appearance > Customize > Additional CSS > Insert the given below of custom CSS code.