www.wysiwygwebbuilder.com

hi

how keep top always? (any object: bar, image, menu, navigation, layout-grid, etc, )
scroll long page vertical

what is rule?

You can use a sticky layer for this.
This is demonstrated in many templates. For example:
https://www.wysiwygwebbuilder.com/suppo ... uthor.html
https://www.wysiwygwebbuilder.com/suppo ... tique.html
https://www.wysiwygwebbuilder.com/suppo ... ocoin.html