The FORM blocks are designed to perform client changes on a data type view. You may change element visibility, accessibility and apply all the CSS styles you know.
Use the set * element block to show/hide, enable/disable, and make [not] required the element you need.
Use set style element and style property-value blocks to set the CSS styles to the element manually.
Both set style element blocks accept the element or element_id (if an ID is declared) from the current web page view as a parameter.
Focus element: select the element and make it selected on the page.