There are two ways to do this.
1) Statically HtmlView
2)Dynamically Custom.js in methods.
But I have few questions on this :
1) In what circumstance we need to select Update Generated Code Checkbox . while generating Workflow ?
2) Do we have or use any layouts for screen designing?
3)how do we Customization of existing component came from WFL form? Any examples on this?
4) Can we bale to hide or remove menus / buttons from screen dynamically ? any reference for this?